Finding the Fourth Proportional to 1,248.71, 1,872.59 and 728.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,248.71 : 1,872.59 = 728.89 : x
2. Step 2: Convert to fraction form
   1,248.71/1,872.59 = 728.89/x
3. Step 3: Cross multiply
   1,248.71x = 1,872.59 × 728.89
4. Step 4: Simplify right side
   1,248.71x = 1,364,903.80
5. Step 5: Solve for x
   x = 1,364,903.80/1,248.71
6. Step 6: Final answer
   x = 1,093.06