Finding the Fourth Proportional to 16,978.85, 23,431.95 and 9,810.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,978.85 : 23,431.95 = 9,810.16 : x
2. Step 2: Convert to fraction form
   16,978.85/23,431.95 = 9,810.16/x
3. Step 3: Cross multiply
   16,978.85x = 23,431.95 × 9,810.16
4. Step 4: Simplify right side
   16,978.85x = 229,871,120.03
5. Step 5: Solve for x
   x = 229,871,120.03/16,978.85
6. Step 6: Final answer
   x = 13,538.68