Finding the Fourth Proportional to 2,870.18, 4,308.52 and 1,140.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.18 : 4,308.52 = 1,140.02 : x
2. Step 2: Convert to fraction form
   2,870.18/4,308.52 = 1,140.02/x
3. Step 3: Cross multiply
   2,870.18x = 4,308.52 × 1,140.02
4. Step 4: Simplify right side
   2,870.18x = 4,911,798.97
5. Step 5: Solve for x
   x = 4,911,798.97/2,870.18
6. Step 6: Final answer
   x = 1,711.32