Finding the Fourth Proportional to 10,575.72, 15,865.98 and 7,290.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,575.72 : 15,865.98 = 7,290.12 : x
2. Step 2: Convert to fraction form
   10,575.72/15,865.98 = 7,290.12/x
3. Step 3: Cross multiply
   10,575.72x = 15,865.98 × 7,290.12
4. Step 4: Simplify right side
   10,575.72x = 115,664,898.12
5. Step 5: Solve for x
   x = 115,664,898.12/10,575.72
6. Step 6: Final answer
   x = 10,936.83