Finding the Fourth Proportional to 2,378.15, 3,567.83 and 916.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,378.15 : 3,567.83 = 916.91 : x
2. Step 2: Convert to fraction form
   2,378.15/3,567.83 = 916.91/x
3. Step 3: Cross multiply
   2,378.15x = 3,567.83 × 916.91
4. Step 4: Simplify right side
   2,378.15x = 3,271,379.01
5. Step 5: Solve for x
   x = 3,271,379.01/2,378.15
6. Step 6: Final answer
   x = 1,375.60