Finding the Fourth Proportional to 5,429.62, 7,491.72 and 4,172.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,429.62 : 7,491.72 = 4,172.05 : x
2. Step 2: Convert to fraction form
   5,429.62/7,491.72 = 4,172.05/x
3. Step 3: Cross multiply
   5,429.62x = 7,491.72 × 4,172.05
4. Step 4: Simplify right side
   5,429.62x = 31,255,830.43
5. Step 5: Solve for x
   x = 31,255,830.43/5,429.62
6. Step 6: Final answer
   x = 5,756.54