Finding the Fourth Proportional to 1,049.80, 1,448.88 and 607.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.80 : 1,448.88 = 607.72 : x
2. Step 2: Convert to fraction form
   1,049.80/1,448.88 = 607.72/x
3. Step 3: Cross multiply
   1,049.80x = 1,448.88 × 607.72
4. Step 4: Simplify right side
   1,049.80x = 880,513.35
5. Step 5: Solve for x
   x = 880,513.35/1,049.80
6. Step 6: Final answer
   x = 838.74