Finding the Fourth Proportional to 10,089.30, 14,139.60 and 10,089.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,089.30 : 14,139.60 = 10,089.30 : x
2. Step 2: Convert to fraction form
   10,089.30/14,139.60 = 10,089.30/x
3. Step 3: Cross multiply
   10,089.30x = 14,139.60 × 10,089.30
4. Step 4: Simplify right side
   10,089.30x = 142,658,666.28
5. Step 5: Solve for x
   x = 142,658,666.28/10,089.30
6. Step 6: Final answer
   x = 14,139.60