Finding the Third Proportional to 59,548,855.50 and 128,990,610

Step by Step Solution

1. Step 1: Write the proportion equation
   59,548,855.50 : 128,990,610 = 128,990,610 : x
2. Step 2: Convert to fraction form
   59,548,855.50/128,990,610 = 128,990,610/x
3. Step 3: Cross multiply
   59,548,855.50x = 128,990,610 × 128,990,610
4. Step 4: Simplify right side
   59,548,855.50x = 16,638,577,468,172,100
5. Step 5: Solve for x
   x = 16,638,577,468,172,100/59,548,855.50
6. Step 6: Final answer
   x = 279,410,533.22