Finding the Third Proportional to 243,909 and 375,367.50

Step by Step Solution

1. Step 1: Write the proportion equation
   243,909 : 375,367.50 = 375,367.50 : x
2. Step 2: Convert to fraction form
   243,909/375,367.50 = 375,367.50/x
3. Step 3: Cross multiply
   243,909x = 375,367.50 × 375,367.50
4. Step 4: Simplify right side
   243,909x = 140,900,760,056.25
5. Step 5: Solve for x
   x = 140,900,760,056.25/243,909
6. Step 6: Final answer
   x = 577,677.58