Finding the Fourth Proportional to 10,908.10, 15,300.50 and 10,908.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,908.10 : 15,300.50 = 10,908.10 : x
2. Step 2: Convert to fraction form
   10,908.10/15,300.50 = 10,908.10/x
3. Step 3: Cross multiply
   10,908.10x = 15,300.50 × 10,908.10
4. Step 4: Simplify right side
   10,908.10x = 166,899,384.05
5. Step 5: Solve for x
   x = 166,899,384.05/10,908.10
6. Step 6: Final answer
   x = 15,300.50