Finding the Fourth Proportional to 1,049.89, 1,448.98 and 607.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.89 : 1,448.98 = 607.80 : x
2. Step 2: Convert to fraction form
   1,049.89/1,448.98 = 607.80/x
3. Step 3: Cross multiply
   1,049.89x = 1,448.98 × 607.80
4. Step 4: Simplify right side
   1,049.89x = 880,687.78
5. Step 5: Solve for x
   x = 880,687.78/1,049.89
6. Step 6: Final answer
   x = 838.84