Finding the Fourth Proportional to 5,429.78, 7,490.72 and 4,168.62

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.78 : 7,490.72 = 4,168.62 : x
2. Step 2: Convert to fraction form
   5,429.78/7,490.72 = 4,168.62/x
3. Step 3: Cross multiply
   5,429.78x = 7,490.72 × 4,168.62
4. Step 4: Simplify right side
   5,429.78x = 31,225,965.21
5. Step 5: Solve for x
   x = 31,225,965.21/5,429.78
6. Step 6: Final answer
   x = 5,750.87