Finding the Fourth Proportional to 12,406.16, 17,120.04 and 7,100.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,406.16 : 17,120.04 = 7,100.84 : x
2. Step 2: Convert to fraction form
   12,406.16/17,120.04 = 7,100.84/x
3. Step 3: Cross multiply
   12,406.16x = 17,120.04 × 7,100.84
4. Step 4: Simplify right side
   12,406.16x = 121,566,664.83
5. Step 5: Solve for x
   x = 121,566,664.83/12,406.16
6. Step 6: Final answer
   x = 9,798.90