Finding the Fourth Proportional to 9,862.95, 13,610.90 and 5,386.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,862.95 : 13,610.90 = 5,386.72 : x
2. Step 2: Convert to fraction form
   9,862.95/13,610.90 = 5,386.72/x
3. Step 3: Cross multiply
   9,862.95x = 13,610.90 × 5,386.72
4. Step 4: Simplify right side
   9,862.95x = 73,318,107.25
5. Step 5: Solve for x
   x = 73,318,107.25/9,862.95
6. Step 6: Final answer
   x = 7,433.69