Finding the Fourth Proportional to 7,445.89, 10,275.43 and 4,089

Step by Step Solution

1. Step 1: Write the proportion equation
   7,445.89 : 10,275.43 = 4,089 : x
2. Step 2: Convert to fraction form
   7,445.89/10,275.43 = 4,089/x
3. Step 3: Cross multiply
   7,445.89x = 10,275.43 × 4,089
4. Step 4: Simplify right side
   7,445.89x = 42,016,233.27
5. Step 5: Solve for x
   x = 42,016,233.27/7,445.89
6. Step 6: Final answer
   x = 5,642.88