Finding the Fourth Proportional to 1,123.94, 1,551.22 and 830.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.94 : 1,551.22 = 830.06 : x
2. Step 2: Convert to fraction form
   1,123.94/1,551.22 = 830.06/x
3. Step 3: Cross multiply
   1,123.94x = 1,551.22 × 830.06
4. Step 4: Simplify right side
   1,123.94x = 1,287,597.92
5. Step 5: Solve for x
   x = 1,287,597.92/1,123.94
6. Step 6: Final answer
   x = 1,145.62