Finding the Fourth Proportional to 11,375.21, 17,065.31 and 3,478.38

Step by Step Solution

1. Step 1: Write the proportion equation
   11,375.21 : 17,065.31 = 3,478.38 : x
2. Step 2: Convert to fraction form
   11,375.21/17,065.31 = 3,478.38/x
3. Step 3: Cross multiply
   11,375.21x = 17,065.31 × 3,478.38
4. Step 4: Simplify right side
   11,375.21x = 59,359,633.00
5. Step 5: Solve for x
   x = 59,359,633.00/11,375.21
6. Step 6: Final answer
   x = 5,218.33