Finding the Fourth Proportional to 11,320.72, 16,981.86 and 4,740.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,320.72 : 16,981.86 = 4,740.28 : x
2. Step 2: Convert to fraction form
   11,320.72/16,981.86 = 4,740.28/x
3. Step 3: Cross multiply
   11,320.72x = 16,981.86 × 4,740.28
4. Step 4: Simplify right side
   11,320.72x = 80,498,771.32
5. Step 5: Solve for x
   x = 80,498,771.32/11,320.72
6. Step 6: Final answer
   x = 7,110.75