Finding the Fourth Proportional to 6,436.66, 8,875.58 and 5,589.89

Step by Step Solution

1. Step 1: Write the proportion equation
   6,436.66 : 8,875.58 = 5,589.89 : x
2. Step 2: Convert to fraction form
   6,436.66/8,875.58 = 5,589.89/x
3. Step 3: Cross multiply
   6,436.66x = 8,875.58 × 5,589.89
4. Step 4: Simplify right side
   6,436.66x = 49,613,515.89
5. Step 5: Solve for x
   x = 49,613,515.89/6,436.66
6. Step 6: Final answer
   x = 7,707.96