Finding the Fourth Proportional to 15,616.57, 23,404.72 and 13,607.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,616.57 : 23,404.72 = 13,607.12 : x
2. Step 2: Convert to fraction form
   15,616.57/23,404.72 = 13,607.12/x
3. Step 3: Cross multiply
   15,616.57x = 23,404.72 × 13,607.12
4. Step 4: Simplify right side
   15,616.57x = 318,470,833.61
5. Step 5: Solve for x
   x = 318,470,833.61/15,616.57
6. Step 6: Final answer
   x = 20,393.14