Finding the Fourth Proportional to 10,087.30, 14,136.80 and 10,087.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,087.30 : 14,136.80 = 10,087.30 : x
2. Step 2: Convert to fraction form
   10,087.30/14,136.80 = 10,087.30/x
3. Step 3: Cross multiply
   10,087.30x = 14,136.80 × 10,087.30
4. Step 4: Simplify right side
   10,087.30x = 142,602,142.64
5. Step 5: Solve for x
   x = 142,602,142.64/10,087.30
6. Step 6: Final answer
   x = 14,136.80