Finding the Fourth Proportional to 57,049.47, 78,728.78 and 31,554.50

Step by Step Solution

1. Step 1: Write the proportion equation
   57,049.47 : 78,728.78 = 31,554.50 : x
2. Step 2: Convert to fraction form
   57,049.47/78,728.78 = 31,554.50/x
3. Step 3: Cross multiply
   57,049.47x = 78,728.78 × 31,554.50
4. Step 4: Simplify right side
   57,049.47x = 2,484,246,973.75
5. Step 5: Solve for x
   x = 2,484,246,973.75/57,049.47
6. Step 6: Final answer
   x = 43,545.49