Finding the Fourth Proportional to 9,860.38, 13,607.88 and 5,384.55

Step by Step Solution

1. Step 1: Write the proportion equation
   9,860.38 : 13,607.88 = 5,384.55 : x
2. Step 2: Convert to fraction form
   9,860.38/13,607.88 = 5,384.55/x
3. Step 3: Cross multiply
   9,860.38x = 13,607.88 × 5,384.55
4. Step 4: Simplify right side
   9,860.38x = 73,272,310.25
5. Step 5: Solve for x
   x = 73,272,310.25/9,860.38
6. Step 6: Final answer
   x = 7,430.98