Finding the Fourth Proportional to 14,385.48, 21,578.34 and 3,998.04

Step by Step Solution

1. Step 1: Write the proportion equation
   14,385.48 : 21,578.34 = 3,998.04 : x
2. Step 2: Convert to fraction form
   14,385.48/21,578.34 = 3,998.04/x
3. Step 3: Cross multiply
   14,385.48x = 21,578.34 × 3,998.04
4. Step 4: Simplify right side
   14,385.48x = 86,271,066.45
5. Step 5: Solve for x
   x = 86,271,066.45/14,385.48
6. Step 6: Final answer
   x = 5,997.09