Finding the Fourth Proportional to 17,691.89, 24,386.47 and 13,429.06

Step by Step Solution

1. Step 1: Write the proportion equation
   17,691.89 : 24,386.47 = 13,429.06 : x
2. Step 2: Convert to fraction form
   17,691.89/24,386.47 = 13,429.06/x
3. Step 3: Cross multiply
   17,691.89x = 24,386.47 × 13,429.06
4. Step 4: Simplify right side
   17,691.89x = 327,487,274.28
5. Step 5: Solve for x
   x = 327,487,274.28/17,691.89
6. Step 6: Final answer
   x = 18,510.59