Finding the Fourth Proportional to 9,777.78, 14,670.72 and 4,230.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,777.78 : 14,670.72 = 4,230.09 : x
2. Step 2: Convert to fraction form
   9,777.78/14,670.72 = 4,230.09/x
3. Step 3: Cross multiply
   9,777.78x = 14,670.72 × 4,230.09
4. Step 4: Simplify right side
   9,777.78x = 62,058,465.96
5. Step 5: Solve for x
   x = 62,058,465.96/9,777.78
6. Step 6: Final answer
   x = 6,346.89