Finding the Fourth Proportional to 1,488.72, 2,228.64 and 837.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.72 : 2,228.64 = 837.48 : x
2. Step 2: Convert to fraction form
   1,488.72/2,228.64 = 837.48/x
3. Step 3: Cross multiply
   1,488.72x = 2,228.64 × 837.48
4. Step 4: Simplify right side
   1,488.72x = 1,866,441.43
5. Step 5: Solve for x
   x = 1,866,441.43/1,488.72
6. Step 6: Final answer
   x = 1,253.72