Finding the Fourth Proportional to 9,061.91, 13,581.71 and 4,320.57

Step by Step Solution

1. Step 1: Write the proportion equation
   9,061.91 : 13,581.71 = 4,320.57 : x
2. Step 2: Convert to fraction form
   9,061.91/13,581.71 = 4,320.57/x
3. Step 3: Cross multiply
   9,061.91x = 13,581.71 × 4,320.57
4. Step 4: Simplify right side
   9,061.91x = 58,680,739.58
5. Step 5: Solve for x
   x = 58,680,739.58/9,061.91
6. Step 6: Final answer
   x = 6,475.54