Finding the Third Proportional to 127,312.50 and 280,048.50

Step by Step Solution

1. Step 1: Write the proportion equation
   127,312.50 : 280,048.50 = 280,048.50 : x
2. Step 2: Convert to fraction form
   127,312.50/280,048.50 = 280,048.50/x
3. Step 3: Cross multiply
   127,312.50x = 280,048.50 × 280,048.50
4. Step 4: Simplify right side
   127,312.50x = 78,427,162,352.25
5. Step 5: Solve for x
   x = 78,427,162,352.25/127,312.50
6. Step 6: Final answer
   x = 616,020.91