Finding the Fourth Proportional to 12,476.74, 17,217.90 and 7,172.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,476.74 : 17,217.90 = 7,172.59 : x
2. Step 2: Convert to fraction form
   12,476.74/17,217.90 = 7,172.59/x
3. Step 3: Cross multiply
   12,476.74x = 17,217.90 × 7,172.59
4. Step 4: Simplify right side
   12,476.74x = 123,496,937.36
5. Step 5: Solve for x
   x = 123,496,937.36/12,476.74
6. Step 6: Final answer
   x = 9,898.17