Finding the Fourth Proportional to 31,686.50, 43,728.74 and 17,539.34

Step by Step Solution

1. Step 1: Write the proportion equation
   31,686.50 : 43,728.74 = 17,539.34 : x
2. Step 2: Convert to fraction form
   31,686.50/43,728.74 = 17,539.34/x
3. Step 3: Cross multiply
   31,686.50x = 43,728.74 × 17,539.34
4. Step 4: Simplify right side
   31,686.50x = 766,973,238.63
5. Step 5: Solve for x
   x = 766,973,238.63/31,686.50
6. Step 6: Final answer
   x = 24,205.05