Finding the Fourth Proportional to 9,978.19, 14,965.56 and 2,958.12

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.19 : 14,965.56 = 2,958.12 : x
2. Step 2: Convert to fraction form
   9,978.19/14,965.56 = 2,958.12/x
3. Step 3: Cross multiply
   9,978.19x = 14,965.56 × 2,958.12
4. Step 4: Simplify right side
   9,978.19x = 44,269,922.35
5. Step 5: Solve for x
   x = 44,269,922.35/9,978.19
6. Step 6: Final answer
   x = 4,436.67