Finding the Fourth Proportional to 9,978.21, 14,968.94 and 2,958.91

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.21 : 14,968.94 = 2,958.91 : x
2. Step 2: Convert to fraction form
   9,978.21/14,968.94 = 2,958.91/x
3. Step 3: Cross multiply
   9,978.21x = 14,968.94 × 2,958.91
4. Step 4: Simplify right side
   9,978.21x = 44,291,694.04
5. Step 5: Solve for x
   x = 44,291,694.04/9,978.21
6. Step 6: Final answer
   x = 4,438.84