Finding the Fourth Proportional to 1,099.37, 1,649.86 and 613.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,099.37 : 1,649.86 = 613.37 : x
2. Step 2: Convert to fraction form
   1,099.37/1,649.86 = 613.37/x
3. Step 3: Cross multiply
   1,099.37x = 1,649.86 × 613.37
4. Step 4: Simplify right side
   1,099.37x = 1,011,966.38
5. Step 5: Solve for x
   x = 1,011,966.38/1,099.37
6. Step 6: Final answer
   x = 920.50