Finding the Fourth Proportional to 1,100.40, 1,649.33 and 612.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.40 : 1,649.33 = 612.47 : x
2. Step 2: Convert to fraction form
   1,100.40/1,649.33 = 612.47/x
3. Step 3: Cross multiply
   1,100.40x = 1,649.33 × 612.47
4. Step 4: Simplify right side
   1,100.40x = 1,010,168.50
5. Step 5: Solve for x
   x = 1,010,168.50/1,100.40
6. Step 6: Final answer
   x = 918.00