Finding the Fourth Proportional to 3,187.28, 4,740.52 and 3,152.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,187.28 : 4,740.52 = 3,152.72 : x
2. Step 2: Convert to fraction form
   3,187.28/4,740.52 = 3,152.72/x
3. Step 3: Cross multiply
   3,187.28x = 4,740.52 × 3,152.72
4. Step 4: Simplify right side
   3,187.28x = 14,945,532.21
5. Step 5: Solve for x
   x = 14,945,532.21/3,187.28
6. Step 6: Final answer
   x = 4,689.12