Finding the Fourth Proportional to 16,688.93, 23,030.61 and 9,615.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,688.93 : 23,030.61 = 9,615.20 : x
2. Step 2: Convert to fraction form
   16,688.93/23,030.61 = 9,615.20/x
3. Step 3: Cross multiply
   16,688.93x = 23,030.61 × 9,615.20
4. Step 4: Simplify right side
   16,688.93x = 221,443,921.27
5. Step 5: Solve for x
   x = 221,443,921.27/16,688.93
6. Step 6: Final answer
   x = 13,268.91