Finding the Fourth Proportional to 10,089.18, 15,114.69 and 5,709.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,089.18 : 15,114.69 = 5,709.78 : x
2. Step 2: Convert to fraction form
   10,089.18/15,114.69 = 5,709.78/x
3. Step 3: Cross multiply
   10,089.18x = 15,114.69 × 5,709.78
4. Step 4: Simplify right side
   10,089.18x = 86,301,554.67
5. Step 5: Solve for x
   x = 86,301,554.67/10,089.18
6. Step 6: Final answer
   x = 8,553.87