Finding the Fourth Proportional to 56,690.62, 78,229.56 and 31,191.82

Step by Step Solution

1. Step 1: Write the proportion equation
   56,690.62 : 78,229.56 = 31,191.82 : x
2. Step 2: Convert to fraction form
   56,690.62/78,229.56 = 31,191.82/x
3. Step 3: Cross multiply
   56,690.62x = 78,229.56 × 31,191.82
4. Step 4: Simplify right side
   56,690.62x = 2,440,122,354.20
5. Step 5: Solve for x
   x = 2,440,122,354.20/56,690.62
6. Step 6: Final answer
   x = 43,042.79