Finding the Fourth Proportional to 31,659, 43,702.86 and 19,728.24

Step by Step Solution

1. Step 1: Write the proportion equation
   31,659 : 43,702.86 = 19,728.24 : x
2. Step 2: Convert to fraction form
   31,659/43,702.86 = 19,728.24/x
3. Step 3: Cross multiply
   31,659x = 43,702.86 × 19,728.24
4. Step 4: Simplify right side
   31,659x = 862,180,510.77
5. Step 5: Solve for x
   x = 862,180,510.77/31,659
6. Step 6: Final answer
   x = 27,233.35