Finding the Third Proportional to 138,793.50 and 298,641.94

Step by Step Solution

1. Step 1: Write the proportion equation
   138,793.50 : 298,641.94 = 298,641.94 : x
2. Step 2: Convert to fraction form
   138,793.50/298,641.94 = 298,641.94/x
3. Step 3: Cross multiply
   138,793.50x = 298,641.94 × 298,641.94
4. Step 4: Simplify right side
   138,793.50x = 89,187,006,833.75
5. Step 5: Solve for x
   x = 89,187,006,833.75/138,793.50
6. Step 6: Final answer
   x = 642,587.78