Finding the Third Proportional to 85,517,992.50 and 186,717,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,517,992.50 : 186,717,139.50 = 186,717,139.50 : x
2. Step 2: Convert to fraction form
   85,517,992.50/186,717,139.50 = 186,717,139.50/x
3. Step 3: Cross multiply
   85,517,992.50x = 186,717,139.50 × 186,717,139.50
4. Step 4: Simplify right side
   85,517,992.50x = 34,863,290,183,062,460
5. Step 5: Solve for x
   x = 34,863,290,183,062,460/85,517,992.50
6. Step 6: Final answer
   x = 407,671,990.00