Finding the Fourth Proportional to 1,493.80, 2,061.46 and 830.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,493.80 : 2,061.46 = 830.79 : x
2. Step 2: Convert to fraction form
   1,493.80/2,061.46 = 830.79/x
3. Step 3: Cross multiply
   1,493.80x = 2,061.46 × 830.79
4. Step 4: Simplify right side
   1,493.80x = 1,712,640.35
5. Step 5: Solve for x
   x = 1,712,640.35/1,493.80
6. Step 6: Final answer
   x = 1,146.50