Finding the Fourth Proportional to 56,650.89, 78,179.09 and 31,158.35

Step by Step Solution

1. Step 1: Write the proportion equation
   56,650.89 : 78,179.09 = 31,158.35 : x
2. Step 2: Convert to fraction form
   56,650.89/78,179.09 = 31,158.35/x
3. Step 3: Cross multiply
   56,650.89x = 78,179.09 × 31,158.35
4. Step 4: Simplify right side
   56,650.89x = 2,435,930,902.21
5. Step 5: Solve for x
   x = 2,435,930,902.21/56,650.89
6. Step 6: Final answer
   x = 42,998.99