Finding the Fourth Proportional to 10,621.83, 16,012.83 and 9,908.49

Step by Step Solution

1. Step 1: Write the proportion equation
   10,621.83 : 16,012.83 = 9,908.49 : x
2. Step 2: Convert to fraction form
   10,621.83/16,012.83 = 9,908.49/x
3. Step 3: Cross multiply
   10,621.83x = 16,012.83 × 9,908.49
4. Step 4: Simplify right side
   10,621.83x = 158,662,965.93
5. Step 5: Solve for x
   x = 158,662,965.93/10,621.83
6. Step 6: Final answer
   x = 14,937.44