Finding the Fourth Proportional to 23,901.89, 32,985.40 and 13,147.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,901.89 : 32,985.40 = 13,147.21 : x
2. Step 2: Convert to fraction form
   23,901.89/32,985.40 = 13,147.21/x
3. Step 3: Cross multiply
   23,901.89x = 32,985.40 × 13,147.21
4. Step 4: Simplify right side
   23,901.89x = 433,665,980.73
5. Step 5: Solve for x
   x = 433,665,980.73/23,901.89
6. Step 6: Final answer
   x = 18,143.59