Finding the Fourth Proportional to 1,488.49, 2,230.79 and 830.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,488.49 : 2,230.79 = 830.34 : x
2. Step 2: Convert to fraction form
   1,488.49/2,230.79 = 830.34/x
3. Step 3: Cross multiply
   1,488.49x = 2,230.79 × 830.34
4. Step 4: Simplify right side
   1,488.49x = 1,852,314.17
5. Step 5: Solve for x
   x = 1,852,314.17/1,488.49
6. Step 6: Final answer
   x = 1,244.43