Finding the Fourth Proportional to 9,862.15, 13,609.17 and 5,385.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,862.15 : 13,609.17 = 5,385.01 : x
2. Step 2: Convert to fraction form
   9,862.15/13,609.17 = 5,385.01/x
3. Step 3: Cross multiply
   9,862.15x = 13,609.17 × 5,385.01
4. Step 4: Simplify right side
   9,862.15x = 73,285,516.54
5. Step 5: Solve for x
   x = 73,285,516.54/9,862.15
6. Step 6: Final answer
   x = 7,430.99