Finding the Fourth Proportional to 1,366.66, 1,885.84 and 807.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,366.66 : 1,885.84 = 807.15 : x
2. Step 2: Convert to fraction form
   1,366.66/1,885.84 = 807.15/x
3. Step 3: Cross multiply
   1,366.66x = 1,885.84 × 807.15
4. Step 4: Simplify right side
   1,366.66x = 1,522,155.76
5. Step 5: Solve for x
   x = 1,522,155.76/1,366.66
6. Step 6: Final answer
   x = 1,113.78