Finding the Fourth Proportional to 11,771.02, 17,656.58 and 3,985.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,771.02 : 17,656.58 = 3,985.30 : x
2. Step 2: Convert to fraction form
   11,771.02/17,656.58 = 3,985.30/x
3. Step 3: Cross multiply
   11,771.02x = 17,656.58 × 3,985.30
4. Step 4: Simplify right side
   11,771.02x = 70,366,800.31
5. Step 5: Solve for x
   x = 70,366,800.31/11,771.02
6. Step 6: Final answer
   x = 5,977.97