Finding the Fourth Proportional to 2,561.32, 3,841.86 and 830.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561.32 : 3,841.86 = 830.08 : x
2. Step 2: Convert to fraction form
   2,561.32/3,841.86 = 830.08/x
3. Step 3: Cross multiply
   2,561.32x = 3,841.86 × 830.08
4. Step 4: Simplify right side
   2,561.32x = 3,189,051.15
5. Step 5: Solve for x
   x = 3,189,051.15/2,561.32
6. Step 6: Final answer
   x = 1,245.08