Finding the Fourth Proportional to 9,410.38, 12,985.31 and 5,218.63

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.38 : 12,985.31 = 5,218.63 : x
2. Step 2: Convert to fraction form
   9,410.38/12,985.31 = 5,218.63/x
3. Step 3: Cross multiply
   9,410.38x = 12,985.31 × 5,218.63
4. Step 4: Simplify right side
   9,410.38x = 67,765,508.91
5. Step 5: Solve for x
   x = 67,765,508.91/9,410.38
6. Step 6: Final answer
   x = 7,201.15