Finding the Third Proportional to 61,731 and 90,402.50

Step by Step Solution

1. Step 1: Write the proportion equation
   61,731 : 90,402.50 = 90,402.50 : x
2. Step 2: Convert to fraction form
   61,731/90,402.50 = 90,402.50/x
3. Step 3: Cross multiply
   61,731x = 90,402.50 × 90,402.50
4. Step 4: Simplify right side
   61,731x = 8,172,612,006.25
5. Step 5: Solve for x
   x = 8,172,612,006.25/61,731
6. Step 6: Final answer
   x = 132,390.73