Finding the Fourth Proportional to 12,405.37, 17,117.58 and 7,099.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,405.37 : 17,117.58 = 7,099.18 : x
2. Step 2: Convert to fraction form
   12,405.37/17,117.58 = 7,099.18/x
3. Step 3: Cross multiply
   12,405.37x = 17,117.58 × 7,099.18
4. Step 4: Simplify right side
   12,405.37x = 121,520,781.58
5. Step 5: Solve for x
   x = 121,520,781.58/12,405.37
6. Step 6: Final answer
   x = 9,795.82