Finding the Fourth Proportional to 10,864.02, 14,992.56 and 7,089.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,864.02 : 14,992.56 = 7,089.60 : x
2. Step 2: Convert to fraction form
   10,864.02/14,992.56 = 7,089.60/x
3. Step 3: Cross multiply
   10,864.02x = 14,992.56 × 7,089.60
4. Step 4: Simplify right side
   10,864.02x = 106,291,253.38
5. Step 5: Solve for x
   x = 106,291,253.38/10,864.02
6. Step 6: Final answer
   x = 9,783.79