Finding the Fourth Proportional to 56,634.55, 78,155.97 and 31,142.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,634.55 : 78,155.97 = 31,142.56 : x
2. Step 2: Convert to fraction form
   56,634.55/78,155.97 = 31,142.56/x
3. Step 3: Cross multiply
   56,634.55x = 78,155.97 × 31,142.56
4. Step 4: Simplify right side
   56,634.55x = 2,433,976,985.08
5. Step 5: Solve for x
   x = 2,433,976,985.08/56,634.55
6. Step 6: Final answer
   x = 42,976.89