Finding the Fourth Proportional to 56,579.43, 78,079.83 and 31,087.86

Step by Step Solution

1. Step 1: Write the proportion equation
   56,579.43 : 78,079.83 = 31,087.86 : x
2. Step 2: Convert to fraction form
   56,579.43/78,079.83 = 31,087.86/x
3. Step 3: Cross multiply
   56,579.43x = 78,079.83 × 31,087.86
4. Step 4: Simplify right side
   56,579.43x = 2,427,334,823.86
5. Step 5: Solve for x
   x = 2,427,334,823.86/56,579.43
6. Step 6: Final answer
   x = 42,901.37