Finding the Fourth Proportional to 13,089.30, 18,067.92 and 7,784.10

Step by Step Solution

1. Step 1: Write the proportion equation
   13,089.30 : 18,067.92 = 7,784.10 : x
2. Step 2: Convert to fraction form
   13,089.30/18,067.92 = 7,784.10/x
3. Step 3: Cross multiply
   13,089.30x = 18,067.92 × 7,784.10
4. Step 4: Simplify right side
   13,089.30x = 140,642,496.07
5. Step 5: Solve for x
   x = 140,642,496.07/13,089.30
6. Step 6: Final answer
   x = 10,744.84