Finding the Fourth Proportional to 56,883.72, 78,499 and 31,390.32

Step by Step Solution

1. Step 1: Write the proportion equation
   56,883.72 : 78,499 = 31,390.32 : x
2. Step 2: Convert to fraction form
   56,883.72/78,499 = 31,390.32/x
3. Step 3: Cross multiply
   56,883.72x = 78,499 × 31,390.32
4. Step 4: Simplify right side
   56,883.72x = 2,464,108,729.68
5. Step 5: Solve for x
   x = 2,464,108,729.68/56,883.72
6. Step 6: Final answer
   x = 43,318.35