Finding the Fourth Proportional to 12,406.32, 17,120.61 and 7,101.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.32 : 17,120.61 = 7,101.21 : x
2. Step 2: Convert to fraction form
   12,406.32/17,120.61 = 7,101.21/x
3. Step 3: Cross multiply
   12,406.32x = 17,120.61 × 7,101.21
4. Step 4: Simplify right side
   12,406.32x = 121,577,046.94
5. Step 5: Solve for x
   x = 121,577,046.94/12,406.32
6. Step 6: Final answer
   x = 9,799.61