Finding the Fourth Proportional to 15,464.10, 21,340.88 and 8,390.52

Step by Step Solution

1. Step 1: Write the proportion equation
   15,464.10 : 21,340.88 = 8,390.52 : x
2. Step 2: Convert to fraction form
   15,464.10/21,340.88 = 8,390.52/x
3. Step 3: Cross multiply
   15,464.10x = 21,340.88 × 8,390.52
4. Step 4: Simplify right side
   15,464.10x = 179,061,080.46
5. Step 5: Solve for x
   x = 179,061,080.46/15,464.10
6. Step 6: Final answer
   x = 11,579.15