Finding the Fourth Proportional to 16,971.31, 23,419.28 and 9,417.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,971.31 : 23,419.28 = 9,417.16 : x
2. Step 2: Convert to fraction form
   16,971.31/23,419.28 = 9,417.16/x
3. Step 3: Cross multiply
   16,971.31x = 23,419.28 × 9,417.16
4. Step 4: Simplify right side
   16,971.31x = 220,543,106.84
5. Step 5: Solve for x
   x = 220,543,106.84/16,971.31
6. Step 6: Final answer
   x = 12,995.05