Finding the Fourth Proportional to 1,863.50, 2,570.69 and 1,117.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,863.50 : 2,570.69 = 1,117.28 : x
2. Step 2: Convert to fraction form
   1,863.50/2,570.69 = 1,117.28/x
3. Step 3: Cross multiply
   1,863.50x = 2,570.69 × 1,117.28
4. Step 4: Simplify right side
   1,863.50x = 2,872,189.74
5. Step 5: Solve for x
   x = 2,872,189.74/1,863.50
6. Step 6: Final answer
   x = 1,541.29