Finding the Fourth Proportional to 10,665.10, 14,911.70 and 10,665.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.10 : 14,911.70 = 10,665.10 : x
2. Step 2: Convert to fraction form
   10,665.10/14,911.70 = 10,665.10/x
3. Step 3: Cross multiply
   10,665.10x = 14,911.70 × 10,665.10
4. Step 4: Simplify right side
   10,665.10x = 159,034,771.67
5. Step 5: Solve for x
   x = 159,034,771.67/10,665.10
6. Step 6: Final answer
   x = 14,911.70