Finding the Third Proportional to 132,061.50 and 278,698.50

Step by Step Solution

1. Step 1: Write the proportion equation
   132,061.50 : 278,698.50 = 278,698.50 : x
2. Step 2: Convert to fraction form
   132,061.50/278,698.50 = 278,698.50/x
3. Step 3: Cross multiply
   132,061.50x = 278,698.50 × 278,698.50
4. Step 4: Simplify right side
   132,061.50x = 77,672,853,902.25
5. Step 5: Solve for x
   x = 77,672,853,902.25/132,061.50
6. Step 6: Final answer
   x = 588,156.68