Finding the Third Proportional to 138,773.25 and 298,591.31

Step by Step Solution

1. Step 1: Write the proportion equation
   138,773.25 : 298,591.31 = 298,591.31 : x
2. Step 2: Convert to fraction form
   138,773.25/298,591.31 = 298,591.31/x
3. Step 3: Cross multiply
   138,773.25x = 298,591.31 × 298,591.31
4. Step 4: Simplify right side
   138,773.25x = 89,156,771,900.47
5. Step 5: Solve for x
   x = 89,156,771,900.47/138,773.25
6. Step 6: Final answer
   x = 642,463.67