Finding the Fourth Proportional to 55,253.12, 76,248.72 and 31,380.80

Step by Step Solution

1. Step 1: Write the proportion equation
   55,253.12 : 76,248.72 = 31,380.80 : x
2. Step 2: Convert to fraction form
   55,253.12/76,248.72 = 31,380.80/x
3. Step 3: Cross multiply
   55,253.12x = 76,248.72 × 31,380.80
4. Step 4: Simplify right side
   55,253.12x = 2,392,745,832.58
5. Step 5: Solve for x
   x = 2,392,745,832.58/55,253.12
6. Step 6: Final answer
   x = 43,305.17