Finding the Third Proportional to 18,139,588.50 and 39,467,710.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,139,588.50 : 39,467,710.50 = 39,467,710.50 : x
2. Step 2: Convert to fraction form
   18,139,588.50/39,467,710.50 = 39,467,710.50/x
3. Step 3: Cross multiply
   18,139,588.50x = 39,467,710.50 × 39,467,710.50
4. Step 4: Simplify right side
   18,139,588.50x = 1,557,700,172,111,810.25
5. Step 5: Solve for x
   x = 1,557,700,172,111,810.25/18,139,588.50
6. Step 6: Final answer
   x = 85,872,960.80