Finding the Third Proportional to 61,156.50 and 90,600.75

Step by Step Solution

1. Step 1: Write the proportion equation
   61,156.50 : 90,600.75 = 90,600.75 : x
2. Step 2: Convert to fraction form
   61,156.50/90,600.75 = 90,600.75/x
3. Step 3: Cross multiply
   61,156.50x = 90,600.75 × 90,600.75
4. Step 4: Simplify right side
   61,156.50x = 8,208,495,900.56
5. Step 5: Solve for x
   x = 8,208,495,900.56/61,156.50
6. Step 6: Final answer
   x = 134,221.15