Finding the Fourth Proportional to 7,079.91, 10,621.15 and 2,917.61

Step by Step Solution

1. Step 1: Write the proportion equation
   7,079.91 : 10,621.15 = 2,917.61 : x
2. Step 2: Convert to fraction form
   7,079.91/10,621.15 = 2,917.61/x
3. Step 3: Cross multiply
   7,079.91x = 10,621.15 × 2,917.61
4. Step 4: Simplify right side
   7,079.91x = 30,988,320.35
5. Step 5: Solve for x
   x = 30,988,320.35/7,079.91
6. Step 6: Final answer
   x = 4,376.94