Finding the Fourth Proportional to 12,406.64, 17,121.17 and 7,101.45

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.64 : 17,121.17 = 7,101.45 : x
2. Step 2: Convert to fraction form
   12,406.64/17,121.17 = 7,101.45/x
3. Step 3: Cross multiply
   12,406.64x = 17,121.17 × 7,101.45
4. Step 4: Simplify right side
   12,406.64x = 121,585,150.45
5. Step 5: Solve for x
   x = 121,585,150.45/12,406.64
6. Step 6: Final answer
   x = 9,800.01