Finding the Fourth Proportional to 56,659.28, 78,189.56 and 31,508.76

Step by Step Solution

1. Step 1: Write the proportion equation
   56,659.28 : 78,189.56 = 31,508.76 : x
2. Step 2: Convert to fraction form
   56,659.28/78,189.56 = 31,508.76/x
3. Step 3: Cross multiply
   56,659.28x = 78,189.56 × 31,508.76
4. Step 4: Simplify right side
   56,659.28x = 2,463,656,080.55
5. Step 5: Solve for x
   x = 2,463,656,080.55/56,659.28
6. Step 6: Final answer
   x = 43,481.95