Finding the Fourth Proportional to 1,100.62, 1,650.48 and 407.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.62 : 1,650.48 = 407.34 : x
2. Step 2: Convert to fraction form
   1,100.62/1,650.48 = 407.34/x
3. Step 3: Cross multiply
   1,100.62x = 1,650.48 × 407.34
4. Step 4: Simplify right side
   1,100.62x = 672,306.52
5. Step 5: Solve for x
   x = 672,306.52/1,100.62
6. Step 6: Final answer
   x = 610.84