Finding the Fourth Proportional to 56,689.24, 78,231.18 and 31,538.76

Step by Step Solution

1. Step 1: Write the proportion equation
   56,689.24 : 78,231.18 = 31,538.76 : x
2. Step 2: Convert to fraction form
   56,689.24/78,231.18 = 31,538.76/x
3. Step 3: Cross multiply
   56,689.24x = 78,231.18 × 31,538.76
4. Step 4: Simplify right side
   56,689.24x = 2,467,314,410.54
5. Step 5: Solve for x
   x = 2,467,314,410.54/56,689.24
6. Step 6: Final answer
   x = 43,523.50