Finding the Fourth Proportional to 124,471.43, 171,744.82 and 72,778.58

Step by Step Solution

1. Step 1: Write the proportion equation
   124,471.43 : 171,744.82 = 72,778.58 : x
2. Step 2: Convert to fraction form
   124,471.43/171,744.82 = 72,778.58/x
3. Step 3: Cross multiply
   124,471.43x = 171,744.82 × 72,778.58
4. Step 4: Simplify right side
   124,471.43x = 12,499,344,369.37
5. Step 5: Solve for x
   x = 12,499,344,369.37/124,471.43
6. Step 6: Final answer
   x = 100,419.38