Finding the Fourth Proportional to 1,101.58, 1,650.23 and 613.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,101.58 : 1,650.23 = 613.15 : x
2. Step 2: Convert to fraction form
   1,101.58/1,650.23 = 613.15/x
3. Step 3: Cross multiply
   1,101.58x = 1,650.23 × 613.15
4. Step 4: Simplify right side
   1,101.58x = 1,011,838.52
5. Step 5: Solve for x
   x = 1,011,838.52/1,101.58
6. Step 6: Final answer
   x = 918.53