Finding the Fourth Proportional to 10,505.10, 14,687.70 and 10,505.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,505.10 : 14,687.70 = 10,505.10 : x
2. Step 2: Convert to fraction form
   10,505.10/14,687.70 = 10,505.10/x
3. Step 3: Cross multiply
   10,505.10x = 14,687.70 × 10,505.10
4. Step 4: Simplify right side
   10,505.10x = 154,295,757.27
5. Step 5: Solve for x
   x = 154,295,757.27/10,505.10
6. Step 6: Final answer
   x = 14,687.70