Finding the Fourth Proportional to 15,528.38, 21,429.32 and 8,454.83

Step by Step Solution

1. Step 1: Write the proportion equation
   15,528.38 : 21,429.32 = 8,454.83 : x
2. Step 2: Convert to fraction form
   15,528.38/21,429.32 = 8,454.83/x
3. Step 3: Cross multiply
   15,528.38x = 21,429.32 × 8,454.83
4. Step 4: Simplify right side
   15,528.38x = 181,181,108.19
5. Step 5: Solve for x
   x = 181,181,108.19/15,528.38
6. Step 6: Final answer
   x = 11,667.74