Finding the Fourth Proportional to 31,152.80, 42,989.36 and 17,722.79

Step by Step Solution

1. Step 1: Write the proportion equation
   31,152.80 : 42,989.36 = 17,722.79 : x
2. Step 2: Convert to fraction form
   31,152.80/42,989.36 = 17,722.79/x
3. Step 3: Cross multiply
   31,152.80x = 42,989.36 × 17,722.79
4. Step 4: Simplify right side
   31,152.80x = 761,891,399.51
5. Step 5: Solve for x
   x = 761,891,399.51/31,152.80
6. Step 6: Final answer
   x = 24,456.59