Finding the Fourth Proportional to 12,006.86, 18,010.54 and 3,122.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,006.86 : 18,010.54 = 3,122.53 : x
2. Step 2: Convert to fraction form
   12,006.86/18,010.54 = 3,122.53/x
3. Step 3: Cross multiply
   12,006.86x = 18,010.54 × 3,122.53
4. Step 4: Simplify right side
   12,006.86x = 56,238,410.34
5. Step 5: Solve for x
   x = 56,238,410.34/12,006.86
6. Step 6: Final answer
   x = 4,683.86