Finding the Fourth Proportional to 56,648.89, 78,173.82 and 31,155.23

Step by Step Solution

1. Step 1: Write the proportion equation
   56,648.89 : 78,173.82 = 31,155.23 : x
2. Step 2: Convert to fraction form
   56,648.89/78,173.82 = 31,155.23/x
3. Step 3: Cross multiply
   56,648.89x = 78,173.82 × 31,155.23
4. Step 4: Simplify right side
   56,648.89x = 2,435,523,449.89
5. Step 5: Solve for x
   x = 2,435,523,449.89/56,648.89
6. Step 6: Final answer
   x = 42,993.31