Finding the Fourth Proportional to 1,360.86, 1,878.10 and 863.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.86 : 1,878.10 = 863.32 : x
2. Step 2: Convert to fraction form
   1,360.86/1,878.10 = 863.32/x
3. Step 3: Cross multiply
   1,360.86x = 1,878.10 × 863.32
4. Step 4: Simplify right side
   1,360.86x = 1,621,401.29
5. Step 5: Solve for x
   x = 1,621,401.29/1,360.86
6. Step 6: Final answer
   x = 1,191.45