Finding the Fourth Proportional to 9,978.24, 14,971.70 and 5,355.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,978.24 : 14,971.70 = 5,355.84 : x
2. Step 2: Convert to fraction form
   9,978.24/14,971.70 = 5,355.84/x
3. Step 3: Cross multiply
   9,978.24x = 14,971.70 × 5,355.84
4. Step 4: Simplify right side
   9,978.24x = 80,186,029.73
5. Step 5: Solve for x
   x = 80,186,029.73/9,978.24
6. Step 6: Final answer
   x = 8,036.09