Finding the Fourth Proportional to 1,360.17, 1,876.71 and 862.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,360.17 : 1,876.71 = 862.64 : x
2. Step 2: Convert to fraction form
   1,360.17/1,876.71 = 862.64/x
3. Step 3: Cross multiply
   1,360.17x = 1,876.71 × 862.64
4. Step 4: Simplify right side
   1,360.17x = 1,618,915.73
5. Step 5: Solve for x
   x = 1,618,915.73/1,360.17
6. Step 6: Final answer
   x = 1,190.23