Finding the Third Proportional to 59,542,956.50 and 128,980,109

Step by Step Solution

1. Step 1: Write the proportion equation
   59,542,956.50 : 128,980,109 = 128,980,109 : x
2. Step 2: Convert to fraction form
   59,542,956.50/128,980,109 = 128,980,109/x
3. Step 3: Cross multiply
   59,542,956.50x = 128,980,109 × 128,980,109
4. Step 4: Simplify right side
   59,542,956.50x = 16,635,868,517,651,880
5. Step 5: Solve for x
   x = 16,635,868,517,651,880/59,542,956.50
6. Step 6: Final answer
   x = 279,392,719.06