Finding the Fourth Proportional to 7,042.75, 9,719.01 and 3,899.41

Step by Step Solution

1. Step 1: Write the proportion equation
   7,042.75 : 9,719.01 = 3,899.41 : x
2. Step 2: Convert to fraction form
   7,042.75/9,719.01 = 3,899.41/x
3. Step 3: Cross multiply
   7,042.75x = 9,719.01 × 3,899.41
4. Step 4: Simplify right side
   7,042.75x = 37,898,404.78
5. Step 5: Solve for x
   x = 37,898,404.78/7,042.75
6. Step 6: Final answer
   x = 5,381.19