Finding the Fourth Proportional to 1,100.73, 1,648.97 and 612.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.73 : 1,648.97 = 612.30 : x
2. Step 2: Convert to fraction form
   1,100.73/1,648.97 = 612.30/x
3. Step 3: Cross multiply
   1,100.73x = 1,648.97 × 612.30
4. Step 4: Simplify right side
   1,100.73x = 1,009,664.33
5. Step 5: Solve for x
   x = 1,009,664.33/1,100.73
6. Step 6: Final answer
   x = 917.27