Finding the Fourth Proportional to 56,555.28, 78,049.80 and 31,404.96

Step by Step Solution

1. Step 1: Write the proportion equation
   56,555.28 : 78,049.80 = 31,404.96 : x
2. Step 2: Convert to fraction form
   56,555.28/78,049.80 = 31,404.96/x
3. Step 3: Cross multiply
   56,555.28x = 78,049.80 × 31,404.96
4. Step 4: Simplify right side
   56,555.28x = 2,451,150,847.01
5. Step 5: Solve for x
   x = 2,451,150,847.01/56,555.28
6. Step 6: Final answer
   x = 43,340.80