Finding the Fourth Proportional to 12,388.23, 17,089.83 and 8,137.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.23 : 17,089.83 = 8,137.58 : x
2. Step 2: Convert to fraction form
   12,388.23/17,089.83 = 8,137.58/x
3. Step 3: Cross multiply
   12,388.23x = 17,089.83 × 8,137.58
4. Step 4: Simplify right side
   12,388.23x = 139,069,773.36
5. Step 5: Solve for x
   x = 139,069,773.36/12,388.23
6. Step 6: Final answer
   x = 11,225.96