Finding the Fourth Proportional to 56,630.59, 78,141.61 and 31,138

Step by Step Solution

1. Step 1: Write the proportion equation
   56,630.59 : 78,141.61 = 31,138 : x
2. Step 2: Convert to fraction form
   56,630.59/78,141.61 = 31,138/x
3. Step 3: Cross multiply
   56,630.59x = 78,141.61 × 31,138
4. Step 4: Simplify right side
   56,630.59x = 2,433,173,452.18
5. Step 5: Solve for x
   x = 2,433,173,452.18/56,630.59
6. Step 6: Final answer
   x = 42,965.71