Finding the Fourth Proportional to 12,777.50, 19,168.67 and 4,459.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,777.50 : 19,168.67 = 4,459.89 : x
2. Step 2: Convert to fraction form
   12,777.50/19,168.67 = 4,459.89/x
3. Step 3: Cross multiply
   12,777.50x = 19,168.67 × 4,459.89
4. Step 4: Simplify right side
   12,777.50x = 85,490,137.35
5. Step 5: Solve for x
   x = 85,490,137.35/12,777.50
6. Step 6: Final answer
   x = 6,690.68