Finding the Fourth Proportional to 56,633.88, 78,155.70 and 31,141.35

Step by Step Solution

1. Step 1: Write the proportion equation
   56,633.88 : 78,155.70 = 31,141.35 : x
2. Step 2: Convert to fraction form
   56,633.88/78,155.70 = 31,141.35/x
3. Step 3: Cross multiply
   56,633.88x = 78,155.70 × 31,141.35
4. Step 4: Simplify right side
   56,633.88x = 2,433,874,008.20
5. Step 5: Solve for x
   x = 2,433,874,008.20/56,633.88
6. Step 6: Final answer
   x = 42,975.58