Finding the Third Proportional to 59,872,819.50 and 128,689,915.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,872,819.50 : 128,689,915.50 = 128,689,915.50 : x
2. Step 2: Convert to fraction form
   59,872,819.50/128,689,915.50 = 128,689,915.50/x
3. Step 3: Cross multiply
   59,872,819.50x = 128,689,915.50 × 128,689,915.50
4. Step 4: Simplify right side
   59,872,819.50x = 16,561,094,351,397,140
5. Step 5: Solve for x
   x = 16,561,094,351,397,140/59,872,819.50
6. Step 6: Final answer
   x = 276,604,550.94