Finding the Fourth Proportional to 9,996.81, 14,978.80 and 3,419.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,996.81 : 14,978.80 = 3,419.41 : x
2. Step 2: Convert to fraction form
   9,996.81/14,978.80 = 3,419.41/x
3. Step 3: Cross multiply
   9,996.81x = 14,978.80 × 3,419.41
4. Step 4: Simplify right side
   9,996.81x = 51,218,658.51
5. Step 5: Solve for x
   x = 51,218,658.51/9,996.81
6. Step 6: Final answer
   x = 5,123.50