Finding the Third Proportional to 18,188,131.50 and 39,290,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   18,188,131.50 : 39,290,899.50 = 39,290,899.50 : x
2. Step 2: Convert to fraction form
   18,188,131.50/39,290,899.50 = 39,290,899.50/x
3. Step 3: Cross multiply
   18,188,131.50x = 39,290,899.50 × 39,290,899.50
4. Step 4: Simplify right side
   18,188,131.50x = 1,543,774,783,519,100.25
5. Step 5: Solve for x
   x = 1,543,774,783,519,100.25/18,188,131.50
6. Step 6: Final answer
   x = 84,878,140.64