Finding the Fourth Proportional to 1,755.98, 2,630.20 and 830.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,755.98 : 2,630.20 = 830.15 : x
2. Step 2: Convert to fraction form
   1,755.98/2,630.20 = 830.15/x
3. Step 3: Cross multiply
   1,755.98x = 2,630.20 × 830.15
4. Step 4: Simplify right side
   1,755.98x = 2,183,460.53
5. Step 5: Solve for x
   x = 2,183,460.53/1,755.98
6. Step 6: Final answer
   x = 1,243.44