Finding the Fourth Proportional to 17,978.12, 27,021 and 14,878.04

Step by Step Solution

1. Step 1: Write the proportion equation
   17,978.12 : 27,021 = 14,878.04 : x
2. Step 2: Convert to fraction form
   17,978.12/27,021 = 14,878.04/x
3. Step 3: Cross multiply
   17,978.12x = 27,021 × 14,878.04
4. Step 4: Simplify right side
   17,978.12x = 402,019,518.84
5. Step 5: Solve for x
   x = 402,019,518.84/17,978.12
6. Step 6: Final answer
   x = 22,361.60