Finding the Fourth Proportional to 2,572.59, 3,858.83 and 841.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.59 : 3,858.83 = 841.21 : x
2. Step 2: Convert to fraction form
   2,572.59/3,858.83 = 841.21/x
3. Step 3: Cross multiply
   2,572.59x = 3,858.83 × 841.21
4. Step 4: Simplify right side
   2,572.59x = 3,246,086.38
5. Step 5: Solve for x
   x = 3,246,086.38/2,572.59
6. Step 6: Final answer
   x = 1,261.80