Finding the Fourth Proportional to 7,018.88, 10,520.12 and 3,898.16

Step by Step Solution

1. Step 1: Write the proportion equation
   7,018.88 : 10,520.12 = 3,898.16 : x
2. Step 2: Convert to fraction form
   7,018.88/10,520.12 = 3,898.16/x
3. Step 3: Cross multiply
   7,018.88x = 10,520.12 × 3,898.16
4. Step 4: Simplify right side
   7,018.88x = 41,009,110.98
5. Step 5: Solve for x
   x = 41,009,110.98/7,018.88
6. Step 6: Final answer
   x = 5,842.69