Finding the Fourth Proportional to 1,520.27, 2,098.18 and 891.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,520.27 : 2,098.18 = 891.05 : x
2. Step 2: Convert to fraction form
   1,520.27/2,098.18 = 891.05/x
3. Step 3: Cross multiply
   1,520.27x = 2,098.18 × 891.05
4. Step 4: Simplify right side
   1,520.27x = 1,869,583.21
5. Step 5: Solve for x
   x = 1,869,583.21/1,520.27
6. Step 6: Final answer
   x = 1,229.77