Finding the Fourth Proportional to 57,055.01, 78,729.82 and 31,557.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,055.01 : 78,729.82 = 31,557.31 : x
2. Step 2: Convert to fraction form
   57,055.01/78,729.82 = 31,557.31/x
3. Step 3: Cross multiply
   57,055.01x = 78,729.82 × 31,557.31
4. Step 4: Simplify right side
   57,055.01x = 2,484,501,060.27
5. Step 5: Solve for x
   x = 2,484,501,060.27/57,055.01
6. Step 6: Final answer
   x = 43,545.72