Finding the Fourth Proportional to 12,936.42, 17,855.77 and 12,152.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,936.42 : 17,855.77 = 12,152.34 : x
2. Step 2: Convert to fraction form
   12,936.42/17,855.77 = 12,152.34/x
3. Step 3: Cross multiply
   12,936.42x = 17,855.77 × 12,152.34
4. Step 4: Simplify right side
   12,936.42x = 216,989,388.00
5. Step 5: Solve for x
   x = 216,989,388.00/12,936.42
6. Step 6: Final answer
   x = 16,773.53