Finding the Fourth Proportional to 1,030.81, 1,422.52 and 611.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.81 : 1,422.52 = 611.37 : x
2. Step 2: Convert to fraction form
   1,030.81/1,422.52 = 611.37/x
3. Step 3: Cross multiply
   1,030.81x = 1,422.52 × 611.37
4. Step 4: Simplify right side
   1,030.81x = 869,679.66
5. Step 5: Solve for x
   x = 869,679.66/1,030.81
6. Step 6: Final answer
   x = 843.69