Finding the Fourth Proportional to 9,900.06, 13,661.69 and 5,918.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,900.06 : 13,661.69 = 5,918.82 : x
2. Step 2: Convert to fraction form
   9,900.06/13,661.69 = 5,918.82/x
3. Step 3: Cross multiply
   9,900.06x = 13,661.69 × 5,918.82
4. Step 4: Simplify right side
   9,900.06x = 80,861,054.41
5. Step 5: Solve for x
   x = 80,861,054.41/9,900.06
6. Step 6: Final answer
   x = 8,167.73