Finding the Fourth Proportional to 2,562.06, 3,842.15 and 918.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.06 : 3,842.15 = 918.21 : x
2. Step 2: Convert to fraction form
   2,562.06/3,842.15 = 918.21/x
3. Step 3: Cross multiply
   2,562.06x = 3,842.15 × 918.21
4. Step 4: Simplify right side
   2,562.06x = 3,527,895.96
5. Step 5: Solve for x
   x = 3,527,895.96/2,562.06
6. Step 6: Final answer
   x = 1,376.98