Finding the Fourth Proportional to 8,123.38, 12,185.31 and 2,279.99

Step by Step Solution

1. Step 1: Write the proportion equation
   8,123.38 : 12,185.31 = 2,279.99 : x
2. Step 2: Convert to fraction form
   8,123.38/12,185.31 = 2,279.99/x
3. Step 3: Cross multiply
   8,123.38x = 12,185.31 × 2,279.99
4. Step 4: Simplify right side
   8,123.38x = 27,782,384.95
5. Step 5: Solve for x
   x = 27,782,384.95/8,123.38
6. Step 6: Final answer
   x = 3,420.05