Finding the Fourth Proportional to 14,128.32, 21,191.54 and 5,806.18

Step by Step Solution

1. Step 1: Write the proportion equation
   14,128.32 : 21,191.54 = 5,806.18 : x
2. Step 2: Convert to fraction form
   14,128.32/21,191.54 = 5,806.18/x
3. Step 3: Cross multiply
   14,128.32x = 21,191.54 × 5,806.18
4. Step 4: Simplify right side
   14,128.32x = 123,041,895.72
5. Step 5: Solve for x
   x = 123,041,895.72/14,128.32
6. Step 6: Final answer
   x = 8,708.88