Finding the Fourth Proportional to 12,855.62, 17,748.60 and 12,061.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,855.62 : 17,748.60 = 12,061.46 : x
2. Step 2: Convert to fraction form
   12,855.62/17,748.60 = 12,061.46/x
3. Step 3: Cross multiply
   12,855.62x = 17,748.60 × 12,061.46
4. Step 4: Simplify right side
   12,855.62x = 214,074,028.96
5. Step 5: Solve for x
   x = 214,074,028.96/12,855.62
6. Step 6: Final answer
   x = 16,652.17