Finding the Fourth Proportional to 1,492.88, 2,059.85 and 863.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,492.88 : 2,059.85 = 863.30 : x
2. Step 2: Convert to fraction form
   1,492.88/2,059.85 = 863.30/x
3. Step 3: Cross multiply
   1,492.88x = 2,059.85 × 863.30
4. Step 4: Simplify right side
   1,492.88x = 1,778,275.81
5. Step 5: Solve for x
   x = 1,778,275.81/1,492.88
6. Step 6: Final answer
   x = 1,191.18