Finding the Fourth Proportional to 9,860.79, 13,607.82 and 5,384.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.79 : 13,607.82 = 5,384.54 : x
2. Step 2: Convert to fraction form
   9,860.79/13,607.82 = 5,384.54/x
3. Step 3: Cross multiply
   9,860.79x = 13,607.82 × 5,384.54
4. Step 4: Simplify right side
   9,860.79x = 73,271,851.10
5. Step 5: Solve for x
   x = 73,271,851.10/9,860.79
6. Step 6: Final answer
   x = 7,430.63