Finding the Fourth Proportional to 15,326.76, 21,150.72 and 8,612.40

Step by Step Solution

1. Step 1: Write the proportion equation
   15,326.76 : 21,150.72 = 8,612.40 : x
2. Step 2: Convert to fraction form
   15,326.76/21,150.72 = 8,612.40/x
3. Step 3: Cross multiply
   15,326.76x = 21,150.72 × 8,612.40
4. Step 4: Simplify right side
   15,326.76x = 182,158,460.93
5. Step 5: Solve for x
   x = 182,158,460.93/15,326.76
6. Step 6: Final answer
   x = 11,884.99