Finding the Fourth Proportional to 2,486.72, 3,729.12 and 842.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,486.72 : 3,729.12 = 842.96 : x
2. Step 2: Convert to fraction form
   2,486.72/3,729.12 = 842.96/x
3. Step 3: Cross multiply
   2,486.72x = 3,729.12 × 842.96
4. Step 4: Simplify right side
   2,486.72x = 3,143,499.00
5. Step 5: Solve for x
   x = 3,143,499.00/2,486.72
6. Step 6: Final answer
   x = 1,264.11