Finding the Fourth Proportional to 57,178.71, 78,900.48 and 31,682.34

Step by Step Solution

1. Step 1: Write the proportion equation
   57,178.71 : 78,900.48 = 31,682.34 : x
2. Step 2: Convert to fraction form
   57,178.71/78,900.48 = 31,682.34/x
3. Step 3: Cross multiply
   57,178.71x = 78,900.48 × 31,682.34
4. Step 4: Simplify right side
   57,178.71x = 2,499,751,833.52
5. Step 5: Solve for x
   x = 2,499,751,833.52/57,178.71
6. Step 6: Final answer
   x = 43,718.23