Finding the Fourth Proportional to 57,744, 79,686.72 and 31,248

Step by Step Solution

1. Step 1: Write the proportion equation
   57,744 : 79,686.72 = 31,248 : x
2. Step 2: Convert to fraction form
   57,744/79,686.72 = 31,248/x
3. Step 3: Cross multiply
   57,744x = 79,686.72 × 31,248
4. Step 4: Simplify right side
   57,744x = 2,490,050,626.56
5. Step 5: Solve for x
   x = 2,490,050,626.56/57,744
6. Step 6: Final answer
   x = 43,122.24