Finding the Third Proportional to 51,818.50 and 61,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   51,818.50 : 61,280.50 = 61,280.50 : x
2. Step 2: Convert to fraction form
   51,818.50/61,280.50 = 61,280.50/x
3. Step 3: Cross multiply
   51,818.50x = 61,280.50 × 61,280.50
4. Step 4: Simplify right side
   51,818.50x = 3,755,299,680.25
5. Step 5: Solve for x
   x = 3,755,299,680.25/51,818.50
6. Step 6: Final answer
   x = 72,470.25