Finding the Third Proportional to 42,331 and 56,657

Step by Step Solution

1. Step 1: Write the proportion equation
   42,331 : 56,657 = 56,657 : x
2. Step 2: Convert to fraction form
   42,331/56,657 = 56,657/x
3. Step 3: Cross multiply
   42,331x = 56,657 × 56,657
4. Step 4: Simplify right side
   42,331x = 3,210,015,649
5. Step 5: Solve for x
   x = 3,210,015,649/42,331
6. Step 6: Final answer
   x = 75,831.32