Finding the Fourth Proportional to 11,282.16, 16,910.16 and 5,430.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,282.16 : 16,910.16 = 5,430.72 : x
2. Step 2: Convert to fraction form
   11,282.16/16,910.16 = 5,430.72/x
3. Step 3: Cross multiply
   11,282.16x = 16,910.16 × 5,430.72
4. Step 4: Simplify right side
   11,282.16x = 91,834,344.12
5. Step 5: Solve for x
   x = 91,834,344.12/11,282.16
6. Step 6: Final answer
   x = 8,139.78