Finding the Fourth Proportional to 9,860.52, 13,606.98 and 5,384.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.52 : 13,606.98 = 5,384.20 : x
2. Step 2: Convert to fraction form
   9,860.52/13,606.98 = 5,384.20/x
3. Step 3: Cross multiply
   9,860.52x = 13,606.98 × 5,384.20
4. Step 4: Simplify right side
   9,860.52x = 73,262,701.72
5. Step 5: Solve for x
   x = 73,262,701.72/9,860.52
6. Step 6: Final answer
   x = 7,429.90