Finding the Fourth Proportional to 8,965.98, 13,451.40 and 3,123.09

Step by Step Solution

1. Step 1: Write the proportion equation
   8,965.98 : 13,451.40 = 3,123.09 : x
2. Step 2: Convert to fraction form
   8,965.98/13,451.40 = 3,123.09/x
3. Step 3: Cross multiply
   8,965.98x = 13,451.40 × 3,123.09
4. Step 4: Simplify right side
   8,965.98x = 42,009,932.83
5. Step 5: Solve for x
   x = 42,009,932.83/8,965.98
6. Step 6: Final answer
   x = 4,685.48