Finding the Fourth Proportional to 23,019.21, 34,520.99 and 8,978.13

Step by Step Solution

1. Step 1: Write the proportion equation
   23,019.21 : 34,520.99 = 8,978.13 : x
2. Step 2: Convert to fraction form
   23,019.21/34,520.99 = 8,978.13/x
3. Step 3: Cross multiply
   23,019.21x = 34,520.99 × 8,978.13
4. Step 4: Simplify right side
   23,019.21x = 309,933,891.06
5. Step 5: Solve for x
   x = 309,933,891.06/23,019.21
6. Step 6: Final answer
   x = 13,464.14