Finding the Fourth Proportional to 10,922.40, 16,385.40 and 3,528.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,922.40 : 16,385.40 = 3,528.72 : x
2. Step 2: Convert to fraction form
   10,922.40/16,385.40 = 3,528.72/x
3. Step 3: Cross multiply
   10,922.40x = 16,385.40 × 3,528.72
4. Step 4: Simplify right side
   10,922.40x = 57,819,488.69
5. Step 5: Solve for x
   x = 57,819,488.69/10,922.40
6. Step 6: Final answer
   x = 5,293.66