Finding the Fourth Proportional to 12,474.84, 17,216.46 and 7,172.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,474.84 : 17,216.46 = 7,172.76 : x
2. Step 2: Convert to fraction form
   12,474.84/17,216.46 = 7,172.76/x
3. Step 3: Cross multiply
   12,474.84x = 17,216.46 × 7,172.76
4. Step 4: Simplify right side
   12,474.84x = 123,489,535.63
5. Step 5: Solve for x
   x = 123,489,535.63/12,474.84
6. Step 6: Final answer
   x = 9,899.09