Finding the Fourth Proportional to 15,498.63, 21,388.05 and 8,425.08

Step by Step Solution

1. Step 1: Write the proportion equation
   15,498.63 : 21,388.05 = 8,425.08 : x
2. Step 2: Convert to fraction form
   15,498.63/21,388.05 = 8,425.08/x
3. Step 3: Cross multiply
   15,498.63x = 21,388.05 × 8,425.08
4. Step 4: Simplify right side
   15,498.63x = 180,196,032.29
5. Step 5: Solve for x
   x = 180,196,032.29/15,498.63
6. Step 6: Final answer
   x = 11,626.58