Finding the Fourth Proportional to 10,081.77, 15,120.69 and 9,581.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.77 : 15,120.69 = 9,581.69 : x
2. Step 2: Convert to fraction form
   10,081.77/15,120.69 = 9,581.69/x
3. Step 3: Cross multiply
   10,081.77x = 15,120.69 × 9,581.69
4. Step 4: Simplify right side
   10,081.77x = 144,881,709.33
5. Step 5: Solve for x
   x = 144,881,709.33/10,081.77
6. Step 6: Final answer
   x = 14,370.66