Finding the Fourth Proportional to 12,423.06, 17,145.39 and 7,117.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,423.06 : 17,145.39 = 7,117.89 : x
2. Step 2: Convert to fraction form
   12,423.06/17,145.39 = 7,117.89/x
3. Step 3: Cross multiply
   12,423.06x = 17,145.39 × 7,117.89
4. Step 4: Simplify right side
   12,423.06x = 122,039,000.03
5. Step 5: Solve for x
   x = 122,039,000.03/12,423.06
6. Step 6: Final answer
   x = 9,823.59