Finding the Fourth Proportional to 10,086.80, 14,136.10 and 10,086.80

Step by Step Solution

1. Step 1: Write the proportion equation
   10,086.80 : 14,136.10 = 10,086.80 : x
2. Step 2: Convert to fraction form
   10,086.80/14,136.10 = 10,086.80/x
3. Step 3: Cross multiply
   10,086.80x = 14,136.10 × 10,086.80
4. Step 4: Simplify right side
   10,086.80x = 142,588,013.48
5. Step 5: Solve for x
   x = 142,588,013.48/10,086.80
6. Step 6: Final answer
   x = 14,136.10