Finding the Fourth Proportional to 23,056.83, 31,818.56 and 12,985.45

Step by Step Solution

1. Step 1: Write the proportion equation
   23,056.83 : 31,818.56 = 12,985.45 : x
2. Step 2: Convert to fraction form
   23,056.83/31,818.56 = 12,985.45/x
3. Step 3: Cross multiply
   23,056.83x = 31,818.56 × 12,985.45
4. Step 4: Simplify right side
   23,056.83x = 413,178,175.48
5. Step 5: Solve for x
   x = 413,178,175.48/23,056.83
6. Step 6: Final answer
   x = 17,919.99