Finding the Third Proportional to 638,092.50 and 988,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   638,092.50 : 988,510.50 = 988,510.50 : x
2. Step 2: Convert to fraction form
   638,092.50/988,510.50 = 988,510.50/x
3. Step 3: Cross multiply
   638,092.50x = 988,510.50 × 988,510.50
4. Step 4: Simplify right side
   638,092.50x = 977,153,008,610.25
5. Step 5: Solve for x
   x = 977,153,008,610.25/638,092.50
6. Step 6: Final answer
   x = 1,531,365.76