Finding the Fourth Proportional to 10,931.34, 15,091.47 and 7,216.14

Step by Step Solution

1. Step 1: Write the proportion equation
   10,931.34 : 15,091.47 = 7,216.14 : x
2. Step 2: Convert to fraction form
   10,931.34/15,091.47 = 7,216.14/x
3. Step 3: Cross multiply
   10,931.34x = 15,091.47 × 7,216.14
4. Step 4: Simplify right side
   10,931.34x = 108,902,160.33
5. Step 5: Solve for x
   x = 108,902,160.33/10,931.34
6. Step 6: Final answer
   x = 9,962.38