Finding the Fourth Proportional to 1,488.72, 2,230.94 and 838.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.72 : 2,230.94 = 838.08 : x
2. Step 2: Convert to fraction form
   1,488.72/2,230.94 = 838.08/x
3. Step 3: Cross multiply
   1,488.72x = 2,230.94 × 838.08
4. Step 4: Simplify right side
   1,488.72x = 1,869,706.20
5. Step 5: Solve for x
   x = 1,869,706.20/1,488.72
6. Step 6: Final answer
   x = 1,255.92