Finding the Fourth Proportional to 9,862.72, 13,610.03 and 5,385.58

Step by Step Solution

1. Step 1: Write the proportion equation
   9,862.72 : 13,610.03 = 5,385.58 : x
2. Step 2: Convert to fraction form
   9,862.72/13,610.03 = 5,385.58/x
3. Step 3: Cross multiply
   9,862.72x = 13,610.03 × 5,385.58
4. Step 4: Simplify right side
   9,862.72x = 73,297,844.41
5. Step 5: Solve for x
   x = 73,297,844.41/9,862.72
6. Step 6: Final answer
   x = 7,431.81