Finding the Fourth Proportional to 10,990.56, 16,488.72 and 4,838.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.56 : 16,488.72 = 4,838.88 : x
2. Step 2: Convert to fraction form
   10,990.56/16,488.72 = 4,838.88/x
3. Step 3: Cross multiply
   10,990.56x = 16,488.72 × 4,838.88
4. Step 4: Simplify right side
   10,990.56x = 79,786,937.43
5. Step 5: Solve for x
   x = 79,786,937.43/10,990.56
6. Step 6: Final answer
   x = 7,259.59