Finding the Fourth Proportional to 1,096.02, 1,644.05 and 612.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,096.02 : 1,644.05 = 612.15 : x
2. Step 2: Convert to fraction form
   1,096.02/1,644.05 = 612.15/x
3. Step 3: Cross multiply
   1,096.02x = 1,644.05 × 612.15
4. Step 4: Simplify right side
   1,096.02x = 1,006,402.15
5. Step 5: Solve for x
   x = 1,006,402.15/1,096.02
6. Step 6: Final answer
   x = 918.23