Finding the Third Proportional to 89,850,660 and 128,398,672.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,850,660 : 128,398,672.50 = 128,398,672.50 : x
2. Step 2: Convert to fraction form
   89,850,660/128,398,672.50 = 128,398,672.50/x
3. Step 3: Cross multiply
   89,850,660x = 128,398,672.50 × 128,398,672.50
4. Step 4: Simplify right side
   89,850,660x = 16,486,219,099,762,256
5. Step 5: Solve for x
   x = 16,486,219,099,762,256/89,850,660
6. Step 6: Final answer
   x = 183,484,674.46