Finding the Fourth Proportional to 16,406.04, 22,638.78 and 10,117.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,406.04 : 22,638.78 = 10,117.20 : x
2. Step 2: Convert to fraction form
   16,406.04/22,638.78 = 10,117.20/x
3. Step 3: Cross multiply
   16,406.04x = 22,638.78 × 10,117.20
4. Step 4: Simplify right side
   16,406.04x = 229,041,065.02
5. Step 5: Solve for x
   x = 229,041,065.02/16,406.04
6. Step 6: Final answer
   x = 13,960.78