Finding the Fourth Proportional to 9,860.72, 13,607.87 and 5,384.52

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.72 : 13,607.87 = 5,384.52 : x
2. Step 2: Convert to fraction form
   9,860.72/13,607.87 = 5,384.52/x
3. Step 3: Cross multiply
   9,860.72x = 13,607.87 × 5,384.52
4. Step 4: Simplify right side
   9,860.72x = 73,271,821.25
5. Step 5: Solve for x
   x = 73,271,821.25/9,860.72
6. Step 6: Final answer
   x = 7,430.68