Finding the Fourth Proportional to 28,978.21, 43,462.18 and 13,179.54

Step by Step Solution

1. Step 1: Write the proportion equation
   28,978.21 : 43,462.18 = 13,179.54 : x
2. Step 2: Convert to fraction form
   28,978.21/43,462.18 = 13,179.54/x
3. Step 3: Cross multiply
   28,978.21x = 43,462.18 × 13,179.54
4. Step 4: Simplify right side
   28,978.21x = 572,811,645.12
5. Step 5: Solve for x
   x = 572,811,645.12/28,978.21
6. Step 6: Final answer
   x = 19,766.98