Finding the Fourth Proportional to 5,390.72, 7,438.56 and 3,032.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,390.72 : 7,438.56 = 3,032.72 : x
2. Step 2: Convert to fraction form
   5,390.72/7,438.56 = 3,032.72/x
3. Step 3: Cross multiply
   5,390.72x = 7,438.56 × 3,032.72
4. Step 4: Simplify right side
   5,390.72x = 22,559,069.68
5. Step 5: Solve for x
   x = 22,559,069.68/5,390.72
6. Step 6: Final answer
   x = 4,184.80