Finding the Fourth Proportional to 11,393.98, 17,090.87 and 3,996.70

Step by Step Solution

1. Step 1: Write the proportion equation
   11,393.98 : 17,090.87 = 3,996.70 : x
2. Step 2: Convert to fraction form
   11,393.98/17,090.87 = 3,996.70/x
3. Step 3: Cross multiply
   11,393.98x = 17,090.87 × 3,996.70
4. Step 4: Simplify right side
   11,393.98x = 68,307,017.42
5. Step 5: Solve for x
   x = 68,307,017.42/11,393.98
6. Step 6: Final answer
   x = 5,995.01