Finding the Fourth Proportional to 11,783.30, 17,674.34 and 3,992.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,783.30 : 17,674.34 = 3,992.18 : x
2. Step 2: Convert to fraction form
   11,783.30/17,674.34 = 3,992.18/x
3. Step 3: Cross multiply
   11,783.30x = 17,674.34 × 3,992.18
4. Step 4: Simplify right side
   11,783.30x = 70,559,146.66
5. Step 5: Solve for x
   x = 70,559,146.66/11,783.30
6. Step 6: Final answer
   x = 5,988.06