Finding the Fourth Proportional to 2,123.15, 3,184.79 and 824.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.15 : 3,184.79 = 824.99 : x
2. Step 2: Convert to fraction form
   2,123.15/3,184.79 = 824.99/x
3. Step 3: Cross multiply
   2,123.15x = 3,184.79 × 824.99
4. Step 4: Simplify right side
   2,123.15x = 2,627,399.85
5. Step 5: Solve for x
   x = 2,627,399.85/2,123.15
6. Step 6: Final answer
   x = 1,237.50