Finding the Fourth Proportional to 10,581.82, 15,880.70 and 7,242.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,581.82 : 15,880.70 = 7,242.07 : x
2. Step 2: Convert to fraction form
   10,581.82/15,880.70 = 7,242.07/x
3. Step 3: Cross multiply
   10,581.82x = 15,880.70 × 7,242.07
4. Step 4: Simplify right side
   10,581.82x = 115,009,141.05
5. Step 5: Solve for x
   x = 115,009,141.05/10,581.82
6. Step 6: Final answer
   x = 10,868.56