Finding the Fourth Proportional to 10,981.56, 16,488.78 and 9,505.35

Step by Step Solution

1. Step 1: Write the proportion equation
   10,981.56 : 16,488.78 = 9,505.35 : x
2. Step 2: Convert to fraction form
   10,981.56/16,488.78 = 9,505.35/x
3. Step 3: Cross multiply
   10,981.56x = 16,488.78 × 9,505.35
4. Step 4: Simplify right side
   10,981.56x = 156,731,624.97
5. Step 5: Solve for x
   x = 156,731,624.97/10,981.56
6. Step 6: Final answer
   x = 14,272.26