Finding the Third Proportional to 89,850,782.50 and 128,398,851.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,850,782.50 : 128,398,851.50 = 128,398,851.50 : x
2. Step 2: Convert to fraction form
   89,850,782.50/128,398,851.50 = 128,398,851.50/x
3. Step 3: Cross multiply
   89,850,782.50x = 128,398,851.50 × 128,398,851.50
4. Step 4: Simplify right side
   89,850,782.50x = 16,486,265,066,519,052
5. Step 5: Solve for x
   x = 16,486,265,066,519,052/89,850,782.50
6. Step 6: Final answer
   x = 183,484,935.89