Finding the Fourth Proportional to 9,862.30, 13,609.57 and 5,386.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,862.30 : 13,609.57 = 5,386.05 : x
2. Step 2: Convert to fraction form
   9,862.30/13,609.57 = 5,386.05/x
3. Step 3: Cross multiply
   9,862.30x = 13,609.57 × 5,386.05
4. Step 4: Simplify right side
   9,862.30x = 73,301,824.50
5. Step 5: Solve for x
   x = 73,301,824.50/9,862.30
6. Step 6: Final answer
   x = 7,432.53