Finding the Fourth Proportional to 10,921.46, 15,059.69 and 7,378.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.46 : 15,059.69 = 7,378.52 : x
2. Step 2: Convert to fraction form
   10,921.46/15,059.69 = 7,378.52/x
3. Step 3: Cross multiply
   10,921.46x = 15,059.69 × 7,378.52
4. Step 4: Simplify right side
   10,921.46x = 111,118,111.67
5. Step 5: Solve for x
   x = 111,118,111.67/10,921.46
6. Step 6: Final answer
   x = 10,174.30