Finding the Fourth Proportional to 9,862.61, 13,610.46 and 5,386.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,862.61 : 13,610.46 = 5,386.10 : x
2. Step 2: Convert to fraction form
   9,862.61/13,610.46 = 5,386.10/x
3. Step 3: Cross multiply
   9,862.61x = 13,610.46 × 5,386.10
4. Step 4: Simplify right side
   9,862.61x = 73,307,205.31
5. Step 5: Solve for x
   x = 73,307,205.31/9,862.61
6. Step 6: Final answer
   x = 7,432.84