Finding the Fourth Proportional to 12,152.07, 18,196.56 and 10,408.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,152.07 : 18,196.56 = 10,408.30 : x
2. Step 2: Convert to fraction form
   12,152.07/18,196.56 = 10,408.30/x
3. Step 3: Cross multiply
   12,152.07x = 18,196.56 × 10,408.30
4. Step 4: Simplify right side
   12,152.07x = 189,395,209.96
5. Step 5: Solve for x
   x = 189,395,209.96/12,152.07
6. Step 6: Final answer
   x = 15,585.43