Finding the Fourth Proportional to 9,461.79, 13,058.81 and 5,485.21

Step by Step Solution

1. Step 1: Write the proportion equation
   9,461.79 : 13,058.81 = 5,485.21 : x
2. Step 2: Convert to fraction form
   9,461.79/13,058.81 = 5,485.21/x
3. Step 3: Cross multiply
   9,461.79x = 13,058.81 × 5,485.21
4. Step 4: Simplify right side
   9,461.79x = 71,630,315.20
5. Step 5: Solve for x
   x = 71,630,315.20/9,461.79
6. Step 6: Final answer
   x = 7,570.48