Finding the Fourth Proportional to 15,333.10, 21,158.72 and 8,618.64

Step by Step Solution

1. Step 1: Write the proportion equation
   15,333.10 : 21,158.72 = 8,618.64 : x
2. Step 2: Convert to fraction form
   15,333.10/21,158.72 = 8,618.64/x
3. Step 3: Cross multiply
   15,333.10x = 21,158.72 × 8,618.64
4. Step 4: Simplify right side
   15,333.10x = 182,359,300.42
5. Step 5: Solve for x
   x = 182,359,300.42/15,333.10
6. Step 6: Final answer
   x = 11,893.18