Finding the Fourth Proportional to 9,861.09, 13,608.05 and 5,384.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,861.09 : 13,608.05 = 5,384.61 : x
2. Step 2: Convert to fraction form
   9,861.09/13,608.05 = 5,384.61/x
3. Step 3: Cross multiply
   9,861.09x = 13,608.05 × 5,384.61
4. Step 4: Simplify right side
   9,861.09x = 73,274,015.19
5. Step 5: Solve for x
   x = 73,274,015.19/9,861.09
6. Step 6: Final answer
   x = 7,430.62