Finding the Third Proportional to 112,978.50 and 243,445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,978.50 : 243,445.50 = 243,445.50 : x
2. Step 2: Convert to fraction form
   112,978.50/243,445.50 = 243,445.50/x
3. Step 3: Cross multiply
   112,978.50x = 243,445.50 × 243,445.50
4. Step 4: Simplify right side
   112,978.50x = 59,265,711,470.25
5. Step 5: Solve for x
   x = 59,265,711,470.25/112,978.50
6. Step 6: Final answer
   x = 524,575.13