Finding the Fourth Proportional to 1,100.63, 1,648.71 and 917.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.63 : 1,648.71 = 917.43 : x
2. Step 2: Convert to fraction form
   1,100.63/1,648.71 = 917.43/x
3. Step 3: Cross multiply
   1,100.63x = 1,648.71 × 917.43
4. Step 4: Simplify right side
   1,100.63x = 1,512,576.02
5. Step 5: Solve for x
   x = 1,512,576.02/1,100.63
6. Step 6: Final answer
   x = 1,374.28