Finding the Fourth Proportional to 5,123.33, 7,686.21 and 1,613.34

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.33 : 7,686.21 = 1,613.34 : x
2. Step 2: Convert to fraction form
   5,123.33/7,686.21 = 1,613.34/x
3. Step 3: Cross multiply
   5,123.33x = 7,686.21 × 1,613.34
4. Step 4: Simplify right side
   5,123.33x = 12,400,423.54
5. Step 5: Solve for x
   x = 12,400,423.54/5,123.33
6. Step 6: Final answer
   x = 2,420.38