Finding the Fourth Proportional to 2,123.85, 2,930.45 and 1,337.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.85 : 2,930.45 = 1,337.61 : x
2. Step 2: Convert to fraction form
   2,123.85/2,930.45 = 1,337.61/x
3. Step 3: Cross multiply
   2,123.85x = 2,930.45 × 1,337.61
4. Step 4: Simplify right side
   2,123.85x = 3,919,792.54
5. Step 5: Solve for x
   x = 3,919,792.54/2,123.85
6. Step 6: Final answer
   x = 1,845.61