Finding the Fourth Proportional to 3,547.15, 5,320.72 and 1,081.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,547.15 : 5,320.72 = 1,081.91 : x
2. Step 2: Convert to fraction form
   3,547.15/5,320.72 = 1,081.91/x
3. Step 3: Cross multiply
   3,547.15x = 5,320.72 × 1,081.91
4. Step 4: Simplify right side
   3,547.15x = 5,756,540.18
5. Step 5: Solve for x
   x = 5,756,540.18/3,547.15
6. Step 6: Final answer
   x = 1,622.86