Finding the Fourth Proportional to 7,128.24, 10,690.74 and 3,617.34

Step by Step Solution

1. Step 1: Write the proportion equation
   7,128.24 : 10,690.74 = 3,617.34 : x
2. Step 2: Convert to fraction form
   7,128.24/10,690.74 = 3,617.34/x
3. Step 3: Cross multiply
   7,128.24x = 10,690.74 × 3,617.34
4. Step 4: Simplify right side
   7,128.24x = 38,672,041.43
5. Step 5: Solve for x
   x = 38,672,041.43/7,128.24
6. Step 6: Final answer
   x = 5,425.19