Finding the Fourth Proportional to 9,978.97, 14,971.89 and 4,436.19

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.97 : 14,971.89 = 4,436.19 : x
2. Step 2: Convert to fraction form
   9,978.97/14,971.89 = 4,436.19/x
3. Step 3: Cross multiply
   9,978.97x = 14,971.89 × 4,436.19
4. Step 4: Simplify right side
   9,978.97x = 66,418,182.49
5. Step 5: Solve for x
   x = 66,418,182.49/9,978.97
6. Step 6: Final answer
   x = 6,655.81