Finding the Fourth Proportional to 16,956.17, 23,400.10 and 9,402.06

Step by Step Solution

1. Step 1: Write the proportion equation
   16,956.17 : 23,400.10 = 9,402.06 : x
2. Step 2: Convert to fraction form
   16,956.17/23,400.10 = 9,402.06/x
3. Step 3: Cross multiply
   16,956.17x = 23,400.10 × 9,402.06
4. Step 4: Simplify right side
   16,956.17x = 220,009,144.21
5. Step 5: Solve for x
   x = 220,009,144.21/16,956.17
6. Step 6: Final answer
   x = 12,975.17