Finding the Fourth Proportional to 10,081.80, 14,129.10 and 10,081.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,081.80 : 14,129.10 = 10,081.80 : x
2. Step 2: Convert to fraction form
   10,081.80/14,129.10 = 10,081.80/x
3. Step 3: Cross multiply
   10,081.80x = 14,129.10 × 10,081.80
4. Step 4: Simplify right side
   10,081.80x = 142,446,760.38
5. Step 5: Solve for x
   x = 142,446,760.38/10,081.80
6. Step 6: Final answer
   x = 14,129.10