Finding the Fourth Proportional to 12,902.28, 17,804.52 and 8,417.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,902.28 : 17,804.52 = 8,417.31 : x
2. Step 2: Convert to fraction form
   12,902.28/17,804.52 = 8,417.31/x
3. Step 3: Cross multiply
   12,902.28x = 17,804.52 × 8,417.31
4. Step 4: Simplify right side
   12,902.28x = 149,866,164.24
5. Step 5: Solve for x
   x = 149,866,164.24/12,902.28
6. Step 6: Final answer
   x = 11,615.48