Finding the Fourth Proportional to 12,089.78, 18,123.73 and 4,296.77

Step by Step Solution

1. Step 1: Write the proportion equation
   12,089.78 : 18,123.73 = 4,296.77 : x
2. Step 2: Convert to fraction form
   12,089.78/18,123.73 = 4,296.77/x
3. Step 3: Cross multiply
   12,089.78x = 18,123.73 × 4,296.77
4. Step 4: Simplify right side
   12,089.78x = 77,873,499.35
5. Step 5: Solve for x
   x = 77,873,499.35/12,089.78
6. Step 6: Final answer
   x = 6,441.27