Finding the Third Proportional to 29,731.50 and 61,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   29,731.50 : 61,915.50 = 61,915.50 : x
2. Step 2: Convert to fraction form
   29,731.50/61,915.50 = 61,915.50/x
3. Step 3: Cross multiply
   29,731.50x = 61,915.50 × 61,915.50
4. Step 4: Simplify right side
   29,731.50x = 3,833,529,140.25
5. Step 5: Solve for x
   x = 3,833,529,140.25/29,731.50
6. Step 6: Final answer
   x = 128,938.30