Finding the Fourth Proportional to 7,139.18, 10,713.34 and 3,854.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.18 : 10,713.34 = 3,854.56 : x
2. Step 2: Convert to fraction form
   7,139.18/10,713.34 = 3,854.56/x
3. Step 3: Cross multiply
   7,139.18x = 10,713.34 × 3,854.56
4. Step 4: Simplify right side
   7,139.18x = 41,295,211.83
5. Step 5: Solve for x
   x = 41,295,211.83/7,139.18
6. Step 6: Final answer
   x = 5,784.31