Finding the Fourth Proportional to 56,554, 78,047.76 and 31,405.12

Step by Step Solution

1. Step 1: Write the proportion equation
   56,554 : 78,047.76 = 31,405.12 : x
2. Step 2: Convert to fraction form
   56,554/78,047.76 = 31,405.12/x
3. Step 3: Cross multiply
   56,554x = 78,047.76 × 31,405.12
4. Step 4: Simplify right side
   56,554x = 2,451,099,268.53
5. Step 5: Solve for x
   x = 2,451,099,268.53/56,554
6. Step 6: Final answer
   x = 43,340.86