Finding the Fourth Proportional to 11,159.84, 16,731.56 and 5,320.55

Step by Step Solution

1. Step 1: Write the proportion equation
   11,159.84 : 16,731.56 = 5,320.55 : x
2. Step 2: Convert to fraction form
   11,159.84/16,731.56 = 5,320.55/x
3. Step 3: Cross multiply
   11,159.84x = 16,731.56 × 5,320.55
4. Step 4: Simplify right side
   11,159.84x = 89,020,991.30
5. Step 5: Solve for x
   x = 89,020,991.30/11,159.84
6. Step 6: Final answer
   x = 7,976.91