Finding the Third Proportional to 18,128,519,401.50 and 39,012,029,779.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,128,519,401.50 : 39,012,029,779.50 = 39,012,029,779.50 : x
2. Step 2: Convert to fraction form
   18,128,519,401.50/39,012,029,779.50 = 39,012,029,779.50/x
3. Step 3: Cross multiply
   18,128,519,401.50x = 39,012,029,779.50 × 39,012,029,779.50
4. Step 4: Simplify right side
   18,128,519,401.50x = 1,521,938,467,516,594,782,208
5. Step 5: Solve for x
   x = 1,521,938,467,516,594,782,208/18,128,519,401.50
6. Step 6: Final answer
   x = 83,952,717,472.93