Finding the Fourth Proportional to 3,185.96, 4,779.84 and 1,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,185.96 : 4,779.84 = 1,238.72 : x
2. Step 2: Convert to fraction form
   3,185.96/4,779.84 = 1,238.72/x
3. Step 3: Cross multiply
   3,185.96x = 4,779.84 × 1,238.72
4. Step 4: Simplify right side
   3,185.96x = 5,920,883.40
5. Step 5: Solve for x
   x = 5,920,883.40/3,185.96
6. Step 6: Final answer
   x = 1,858.43