Finding the Fourth Proportional to 56,641.48, 78,162.24 and 31,147.36

Step by Step Solution

1. Step 1: Write the proportion equation
   56,641.48 : 78,162.24 = 31,147.36 : x
2. Step 2: Convert to fraction form
   56,641.48/78,162.24 = 31,147.36/x
3. Step 3: Cross multiply
   56,641.48x = 78,162.24 × 31,147.36
4. Step 4: Simplify right side
   56,641.48x = 2,434,547,427.69
5. Step 5: Solve for x
   x = 2,434,547,427.69/56,641.48
6. Step 6: Final answer
   x = 42,981.71