Finding the Fourth Proportional to 7,142.34, 9,856.56 and 3,998.52

Step by Step Solution

1. Step 1: Write the proportion equation
   7,142.34 : 9,856.56 = 3,998.52 : x
2. Step 2: Convert to fraction form
   7,142.34/9,856.56 = 3,998.52/x
3. Step 3: Cross multiply
   7,142.34x = 9,856.56 × 3,998.52
4. Step 4: Simplify right side
   7,142.34x = 39,411,652.29
5. Step 5: Solve for x
   x = 39,411,652.29/7,142.34
6. Step 6: Final answer
   x = 5,518.03