Finding the Fourth Proportional to 28,018.90, 42,023.49 and 9,298.18

Step by Step Solution

1. Step 1: Write the proportion equation
   28,018.90 : 42,023.49 = 9,298.18 : x
2. Step 2: Convert to fraction form
   28,018.90/42,023.49 = 9,298.18/x
3. Step 3: Cross multiply
   28,018.90x = 42,023.49 × 9,298.18
4. Step 4: Simplify right side
   28,018.90x = 390,741,974.25
5. Step 5: Solve for x
   x = 390,741,974.25/28,018.90
6. Step 6: Final answer
   x = 13,945.66