Finding the Fourth Proportional to 10,930.72, 16,404.05 and 4,358.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,930.72 : 16,404.05 = 4,358.78 : x
2. Step 2: Convert to fraction form
   10,930.72/16,404.05 = 4,358.78/x
3. Step 3: Cross multiply
   10,930.72x = 16,404.05 × 4,358.78
4. Step 4: Simplify right side
   10,930.72x = 71,501,645.06
5. Step 5: Solve for x
   x = 71,501,645.06/10,930.72
6. Step 6: Final answer
   x = 6,541.35