Finding the Fourth Proportional to 10,921.18, 15,076.38 and 7,390.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.18 : 15,076.38 = 7,390.12 : x
2. Step 2: Convert to fraction form
   10,921.18/15,076.38 = 7,390.12/x
3. Step 3: Cross multiply
   10,921.18x = 15,076.38 × 7,390.12
4. Step 4: Simplify right side
   10,921.18x = 111,416,257.37
5. Step 5: Solve for x
   x = 111,416,257.37/10,921.18
6. Step 6: Final answer
   x = 10,201.85