Finding the Fourth Proportional to 56,922.42, 78,557.25 and 31,433.64

Step by Step Solution

1. Step 1: Write the proportion equation
   56,922.42 : 78,557.25 = 31,433.64 : x
2. Step 2: Convert to fraction form
   56,922.42/78,557.25 = 31,433.64/x
3. Step 3: Cross multiply
   56,922.42x = 78,557.25 × 31,433.64
4. Step 4: Simplify right side
   56,922.42x = 2,469,340,315.89
5. Step 5: Solve for x
   x = 2,469,340,315.89/56,922.42
6. Step 6: Final answer
   x = 43,380.80