Finding the Fourth Proportional to 1,036.61, 1,555.83 and 874.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,036.61 : 1,555.83 = 874.41 : x
2. Step 2: Convert to fraction form
   1,036.61/1,555.83 = 874.41/x
3. Step 3: Cross multiply
   1,036.61x = 1,555.83 × 874.41
4. Step 4: Simplify right side
   1,036.61x = 1,360,433.31
5. Step 5: Solve for x
   x = 1,360,433.31/1,036.61
6. Step 6: Final answer
   x = 1,312.39