Finding the Fourth Proportional to 1,118.98, 1,540.84 and 922.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,118.98 : 1,540.84 = 922.15 : x
2. Step 2: Convert to fraction form
   1,118.98/1,540.84 = 922.15/x
3. Step 3: Cross multiply
   1,118.98x = 1,540.84 × 922.15
4. Step 4: Simplify right side
   1,118.98x = 1,420,875.60
5. Step 5: Solve for x
   x = 1,420,875.60/1,118.98
6. Step 6: Final answer
   x = 1,269.80