Finding the Third Proportional to 89,854,060 and 128,403,788.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,854,060 : 128,403,788.50 = 128,403,788.50 : x
2. Step 2: Convert to fraction form
   89,854,060/128,403,788.50 = 128,403,788.50/x
3. Step 3: Cross multiply
   89,854,060x = 128,403,788.50 × 128,403,788.50
4. Step 4: Simplify right side
   89,854,060x = 16,487,532,901,152,732
5. Step 5: Solve for x
   x = 16,487,532,901,152,732/89,854,060
6. Step 6: Final answer
   x = 183,492,353.06