Finding the Fourth Proportional to 57,020.52, 78,688.62 and 31,869.48

Step by Step Solution

1. Step 1: Write the proportion equation
   57,020.52 : 78,688.62 = 31,869.48 : x
2. Step 2: Convert to fraction form
   57,020.52/78,688.62 = 31,869.48/x
3. Step 3: Cross multiply
   57,020.52x = 78,688.62 × 31,869.48
4. Step 4: Simplify right side
   57,020.52x = 2,507,765,401.32
5. Step 5: Solve for x
   x = 2,507,765,401.32/57,020.52
6. Step 6: Final answer
   x = 43,980.05