Finding the Fourth Proportional to 1,247.27, 1,870.96 and 553.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247.27 : 1,870.96 = 553.82 : x
2. Step 2: Convert to fraction form
   1,247.27/1,870.96 = 553.82/x
3. Step 3: Cross multiply
   1,247.27x = 1,870.96 × 553.82
4. Step 4: Simplify right side
   1,247.27x = 1,036,164.33
5. Step 5: Solve for x
   x = 1,036,164.33/1,247.27
6. Step 6: Final answer
   x = 830.74