Finding the Fourth Proportional to 50,451.48, 75,940.29 and 42,840.72

Step by Step Solution

1. Step 1: Write the proportion equation
   50,451.48 : 75,940.29 = 42,840.72 : x
2. Step 2: Convert to fraction form
   50,451.48/75,940.29 = 42,840.72/x
3. Step 3: Cross multiply
   50,451.48x = 75,940.29 × 42,840.72
4. Step 4: Simplify right side
   50,451.48x = 3,253,336,700.61
5. Step 5: Solve for x
   x = 3,253,336,700.61/50,451.48
6. Step 6: Final answer
   x = 64,484.47