Finding the Third Proportional to 64,354.50 and 142,458.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,354.50 : 142,458.75 = 142,458.75 : x
2. Step 2: Convert to fraction form
   64,354.50/142,458.75 = 142,458.75/x
3. Step 3: Cross multiply
   64,354.50x = 142,458.75 × 142,458.75
4. Step 4: Simplify right side
   64,354.50x = 20,294,495,451.56
5. Step 5: Solve for x
   x = 20,294,495,451.56/64,354.50
6. Step 6: Final answer
   x = 315,354.72