Finding the Fourth Proportional to 15,510.42, 21,404.86 and 8,796.32

Step by Step Solution

1. Step 1: Write the proportion equation
   15,510.42 : 21,404.86 = 8,796.32 : x
2. Step 2: Convert to fraction form
   15,510.42/21,404.86 = 8,796.32/x
3. Step 3: Cross multiply
   15,510.42x = 21,404.86 × 8,796.32
4. Step 4: Simplify right side
   15,510.42x = 188,283,998.12
5. Step 5: Solve for x
   x = 188,283,998.12/15,510.42
6. Step 6: Final answer
   x = 12,139.19