Finding the Fourth Proportional to 31,238.80, 43,109.94 and 17,091.88

Step by Step Solution

1. Step 1: Write the proportion equation
   31,238.80 : 43,109.94 = 17,091.88 : x
2. Step 2: Convert to fraction form
   31,238.80/43,109.94 = 17,091.88/x
3. Step 3: Cross multiply
   31,238.80x = 43,109.94 × 17,091.88
4. Step 4: Simplify right side
   31,238.80x = 736,829,921.29
5. Step 5: Solve for x
   x = 736,829,921.29/31,238.80
6. Step 6: Final answer
   x = 23,587.01