Finding the Fourth Proportional to 2,573.56, 3,858.72 and 841.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.56 : 3,858.72 = 841.78 : x
2. Step 2: Convert to fraction form
   2,573.56/3,858.72 = 841.78/x
3. Step 3: Cross multiply
   2,573.56x = 3,858.72 × 841.78
4. Step 4: Simplify right side
   2,573.56x = 3,248,193.32
5. Step 5: Solve for x
   x = 3,248,193.32/2,573.56
6. Step 6: Final answer
   x = 1,262.14