Finding the Third Proportional to 56,909.25 and 124,321.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,909.25 : 124,321.50 = 124,321.50 : x
2. Step 2: Convert to fraction form
   56,909.25/124,321.50 = 124,321.50/x
3. Step 3: Cross multiply
   56,909.25x = 124,321.50 × 124,321.50
4. Step 4: Simplify right side
   56,909.25x = 15,455,835,362.25
5. Step 5: Solve for x
   x = 15,455,835,362.25/56,909.25
6. Step 6: Final answer
   x = 271,587.40