Finding the Fourth Proportional to 56,634.42, 78,155.79 and 31,142.42

Step by Step Solution

1. Step 1: Write the proportion equation
   56,634.42 : 78,155.79 = 31,142.42 : x
2. Step 2: Convert to fraction form
   56,634.42/78,155.79 = 31,142.42/x
3. Step 3: Cross multiply
   56,634.42x = 78,155.79 × 31,142.42
4. Step 4: Simplify right side
   56,634.42x = 2,433,960,046.83
5. Step 5: Solve for x
   x = 2,433,960,046.83/56,634.42
6. Step 6: Final answer
   x = 42,976.69