Finding the Fourth Proportional to 1,247.01, 1,870.42 and 726.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247.01 : 1,870.42 = 726.69 : x
2. Step 2: Convert to fraction form
   1,247.01/1,870.42 = 726.69/x
3. Step 3: Cross multiply
   1,247.01x = 1,870.42 × 726.69
4. Step 4: Simplify right side
   1,247.01x = 1,359,215.06
5. Step 5: Solve for x
   x = 1,359,215.06/1,247.01
6. Step 6: Final answer
   x = 1,089.98