Finding the Fourth Proportional to 28,146.05, 42,233.67 and 12,362.19

Step by Step Solution

1. Step 1: Write the proportion equation
   28,146.05 : 42,233.67 = 12,362.19 : x
2. Step 2: Convert to fraction form
   28,146.05/42,233.67 = 12,362.19/x
3. Step 3: Cross multiply
   28,146.05x = 42,233.67 × 12,362.19
4. Step 4: Simplify right side
   28,146.05x = 522,100,494.56
5. Step 5: Solve for x
   x = 522,100,494.56/28,146.05
6. Step 6: Final answer
   x = 18,549.69