Finding the Fourth Proportional to 3,199.04, 4,385.88 and 3,140.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,199.04 : 4,385.88 = 3,140.72 : x
2. Step 2: Convert to fraction form
   3,199.04/4,385.88 = 3,140.72/x
3. Step 3: Cross multiply
   3,199.04x = 4,385.88 × 3,140.72
4. Step 4: Simplify right side
   3,199.04x = 13,774,821.03
5. Step 5: Solve for x
   x = 13,774,821.03/3,199.04
6. Step 6: Final answer
   x = 4,305.92