Finding the Fourth Proportional to 15,641.46, 21,585.15 and 8,471.34

Step by Step Solution

1. Step 1: Write the proportion equation
   15,641.46 : 21,585.15 = 8,471.34 : x
2. Step 2: Convert to fraction form
   15,641.46/21,585.15 = 8,471.34/x
3. Step 3: Cross multiply
   15,641.46x = 21,585.15 × 8,471.34
4. Step 4: Simplify right side
   15,641.46x = 182,855,144.60
5. Step 5: Solve for x
   x = 182,855,144.60/15,641.46
6. Step 6: Final answer
   x = 11,690.41