Finding the Third Proportional to 138,281.50 and 301,591

Step by Step Solution

1. Step 1: Write the proportion equation
   138,281.50 : 301,591 = 301,591 : x
2. Step 2: Convert to fraction form
   138,281.50/301,591 = 301,591/x
3. Step 3: Cross multiply
   138,281.50x = 301,591 × 301,591
4. Step 4: Simplify right side
   138,281.50x = 90,957,131,281
5. Step 5: Solve for x
   x = 90,957,131,281/138,281.50
6. Step 6: Final answer
   x = 657,767.90