Finding the Fourth Proportional to 9,780.09, 14,670.81 and 3,936.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,780.09 : 14,670.81 = 3,936.75 : x
2. Step 2: Convert to fraction form
   9,780.09/14,670.81 = 3,936.75/x
3. Step 3: Cross multiply
   9,780.09x = 14,670.81 × 3,936.75
4. Step 4: Simplify right side
   9,780.09x = 57,755,311.27
5. Step 5: Solve for x
   x = 57,755,311.27/9,780.09
6. Step 6: Final answer
   x = 5,905.40