Finding the Fourth Proportional to 1,049.72, 1,448.62 and 607.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.72 : 1,448.62 = 607.61 : x
2. Step 2: Convert to fraction form
   1,049.72/1,448.62 = 607.61/x
3. Step 3: Cross multiply
   1,049.72x = 1,448.62 × 607.61
4. Step 4: Simplify right side
   1,049.72x = 880,192.96
5. Step 5: Solve for x
   x = 880,192.96/1,049.72
6. Step 6: Final answer
   x = 838.50