Finding the Fourth Proportional to 5,385.69, 8,080.74 and 2,917.62

Step by Step Solution

1. Step 1: Write the proportion equation
   5,385.69 : 8,080.74 = 2,917.62 : x
2. Step 2: Convert to fraction form
   5,385.69/8,080.74 = 2,917.62/x
3. Step 3: Cross multiply
   5,385.69x = 8,080.74 × 2,917.62
4. Step 4: Simplify right side
   5,385.69x = 23,576,528.64
5. Step 5: Solve for x
   x = 23,576,528.64/5,385.69
6. Step 6: Final answer
   x = 4,377.62