Finding the Fourth Proportional to 1,094.17, 1,648.55 and 990.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,094.17 : 1,648.55 = 990.18 : x
2. Step 2: Convert to fraction form
   1,094.17/1,648.55 = 990.18/x
3. Step 3: Cross multiply
   1,094.17x = 1,648.55 × 990.18
4. Step 4: Simplify right side
   1,094.17x = 1,632,363.71
5. Step 5: Solve for x
   x = 1,632,363.71/1,094.17
6. Step 6: Final answer
   x = 1,491.88