Finding the Fourth Proportional to 5,672.25, 7,828.72 and 5,423.18

Step by Step Solution

1. Step 1: Write the proportion equation
   5,672.25 : 7,828.72 = 5,423.18 : x
2. Step 2: Convert to fraction form
   5,672.25/7,828.72 = 5,423.18/x
3. Step 3: Cross multiply
   5,672.25x = 7,828.72 × 5,423.18
4. Step 4: Simplify right side
   5,672.25x = 42,456,505.03
5. Step 5: Solve for x
   x = 42,456,505.03/5,672.25
6. Step 6: Final answer
   x = 7,484.95