Finding the Fourth Proportional to 12,666.37, 17,479.59 and 7,361.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,666.37 : 17,479.59 = 7,361.53 : x
2. Step 2: Convert to fraction form
   12,666.37/17,479.59 = 7,361.53/x
3. Step 3: Cross multiply
   12,666.37x = 17,479.59 × 7,361.53
4. Step 4: Simplify right side
   12,666.37x = 128,676,526.17
5. Step 5: Solve for x
   x = 128,676,526.17/12,666.37
6. Step 6: Final answer
   x = 10,158.91