Finding the Fourth Proportional to 3,128.62, 4,318.27 and 1,870.42

Step by Step Solution

1. Step 1: Write the proportion equation
   3,128.62 : 4,318.27 = 1,870.42 : x
2. Step 2: Convert to fraction form
   3,128.62/4,318.27 = 1,870.42/x
3. Step 3: Cross multiply
   3,128.62x = 4,318.27 × 1,870.42
4. Step 4: Simplify right side
   3,128.62x = 8,076,978.57
5. Step 5: Solve for x
   x = 8,076,978.57/3,128.62
6. Step 6: Final answer
   x = 2,581.64