Finding the Fourth Proportional to 15,872.51, 21,899.33 and 9,158.02

Step by Step Solution

1. Step 1: Write the proportion equation
   15,872.51 : 21,899.33 = 9,158.02 : x
2. Step 2: Convert to fraction form
   15,872.51/21,899.33 = 9,158.02/x
3. Step 3: Cross multiply
   15,872.51x = 21,899.33 × 9,158.02
4. Step 4: Simplify right side
   15,872.51x = 200,554,435.93
5. Step 5: Solve for x
   x = 200,554,435.93/15,872.51
6. Step 6: Final answer
   x = 12,635.33