Finding the Fourth Proportional to 56,883.55, 78,498.77 and 31,390.15

Step by Step Solution

1. Step 1: Write the proportion equation
   56,883.55 : 78,498.77 = 31,390.15 : x
2. Step 2: Convert to fraction form
   56,883.55/78,498.77 = 31,390.15/x
3. Step 3: Cross multiply
   56,883.55x = 78,498.77 × 31,390.15
4. Step 4: Simplify right side
   56,883.55x = 2,464,088,165.12
5. Step 5: Solve for x
   x = 2,464,088,165.12/56,883.55
6. Step 6: Final answer
   x = 43,318.12