Finding the Fourth Proportional to 9,978.39, 14,984.33 and 9,581.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.39 : 14,984.33 = 9,581.09 : x
2. Step 2: Convert to fraction form
   9,978.39/14,984.33 = 9,581.09/x
3. Step 3: Cross multiply
   9,978.39x = 14,984.33 × 9,581.09
4. Step 4: Simplify right side
   9,978.39x = 143,566,091.49
5. Step 5: Solve for x
   x = 143,566,091.49/9,978.39
6. Step 6: Final answer
   x = 14,387.70