Finding the Fourth Proportional to 11,103.79, 15,315.97 and 7,118.59

Step by Step Solution

1. Step 1: Write the proportion equation
   11,103.79 : 15,315.97 = 7,118.59 : x
2. Step 2: Convert to fraction form
   11,103.79/15,315.97 = 7,118.59/x
3. Step 3: Cross multiply
   11,103.79x = 15,315.97 × 7,118.59
4. Step 4: Simplify right side
   11,103.79x = 109,028,110.88
5. Step 5: Solve for x
   x = 109,028,110.88/11,103.79
6. Step 6: Final answer
   x = 9,819.00