Finding the Fourth Proportional to 28,019.28, 42,029.52 and 8,298.24

Step by Step Solution

1. Step 1: Write the proportion equation
   28,019.28 : 42,029.52 = 8,298.24 : x
2. Step 2: Convert to fraction form
   28,019.28/42,029.52 = 8,298.24/x
3. Step 3: Cross multiply
   28,019.28x = 42,029.52 × 8,298.24
4. Step 4: Simplify right side
   28,019.28x = 348,771,044.04
5. Step 5: Solve for x
   x = 348,771,044.04/28,019.28
6. Step 6: Final answer
   x = 12,447.54