Finding the Fourth Proportional to 1,360.07, 1,877.69 and 863.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.07 : 1,877.69 = 863.13 : x
2. Step 2: Convert to fraction form
   1,360.07/1,877.69 = 863.13/x
3. Step 3: Cross multiply
   1,360.07x = 1,877.69 × 863.13
4. Step 4: Simplify right side
   1,360.07x = 1,620,686.25
5. Step 5: Solve for x
   x = 1,620,686.25/1,360.07
6. Step 6: Final answer
   x = 1,191.62