Finding the Fourth Proportional to 28,022.19, 42,022.34 and 12,232.05

Step by Step Solution

1. Step 1: Write the proportion equation
   28,022.19 : 42,022.34 = 12,232.05 : x
2. Step 2: Convert to fraction form
   28,022.19/42,022.34 = 12,232.05/x
3. Step 3: Cross multiply
   28,022.19x = 42,022.34 × 12,232.05
4. Step 4: Simplify right side
   28,022.19x = 514,019,364.00
5. Step 5: Solve for x
   x = 514,019,364.00/28,022.19
6. Step 6: Final answer
   x = 18,343.30