Finding the Fourth Proportional to 2,807.67, 4,209.71 and 1,165.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,807.67 : 4,209.71 = 1,165.35 : x
2. Step 2: Convert to fraction form
   2,807.67/4,209.71 = 1,165.35/x
3. Step 3: Cross multiply
   2,807.67x = 4,209.71 × 1,165.35
4. Step 4: Simplify right side
   2,807.67x = 4,905,779.72
5. Step 5: Solve for x
   x = 4,905,779.72/2,807.67
6. Step 6: Final answer
   x = 1,747.28