Finding the Fourth Proportional to 7,042.87, 9,719.16 and 3,856.15

Step by Step Solution

1. Step 1: Write the proportion equation
   7,042.87 : 9,719.16 = 3,856.15 : x
2. Step 2: Convert to fraction form
   7,042.87/9,719.16 = 3,856.15/x
3. Step 3: Cross multiply
   7,042.87x = 9,719.16 × 3,856.15
4. Step 4: Simplify right side
   7,042.87x = 37,478,538.83
5. Step 5: Solve for x
   x = 37,478,538.83/7,042.87
6. Step 6: Final answer
   x = 5,321.49