Finding the Fourth Proportional to 12,013.52, 18,019.87 and 5,435.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,013.52 : 18,019.87 = 5,435.10 : x
2. Step 2: Convert to fraction form
   12,013.52/18,019.87 = 5,435.10/x
3. Step 3: Cross multiply
   12,013.52x = 18,019.87 × 5,435.10
4. Step 4: Simplify right side
   12,013.52x = 97,939,781.85
5. Step 5: Solve for x
   x = 97,939,781.85/12,013.52
6. Step 6: Final answer
   x = 8,152.47