Finding the Fourth Proportional to 1,250.72, 1,725.41 and 808.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,250.72 : 1,725.41 = 808.76 : x
2. Step 2: Convert to fraction form
   1,250.72/1,725.41 = 808.76/x
3. Step 3: Cross multiply
   1,250.72x = 1,725.41 × 808.76
4. Step 4: Simplify right side
   1,250.72x = 1,395,445.21
5. Step 5: Solve for x
   x = 1,395,445.21/1,250.72
6. Step 6: Final answer
   x = 1,115.72