Finding the Fourth Proportional to 12,778.18, 19,166.01 and 4,012.86

Step by Step Solution

1. Step 1: Write the proportion equation
   12,778.18 : 19,166.01 = 4,012.86 : x
2. Step 2: Convert to fraction form
   12,778.18/19,166.01 = 4,012.86/x
3. Step 3: Cross multiply
   12,778.18x = 19,166.01 × 4,012.86
4. Step 4: Simplify right side
   12,778.18x = 76,910,514.89
5. Step 5: Solve for x
   x = 76,910,514.89/12,778.18
6. Step 6: Final answer
   x = 6,018.89