Finding the Fourth Proportional to 2,124.07, 2,930.77 and 1,338.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.07 : 2,930.77 = 1,338.57 : x
2. Step 2: Convert to fraction form
   2,124.07/2,930.77 = 1,338.57/x
3. Step 3: Cross multiply
   2,124.07x = 2,930.77 × 1,338.57
4. Step 4: Simplify right side
   2,124.07x = 3,923,040.80
5. Step 5: Solve for x
   x = 3,923,040.80/2,124.07
6. Step 6: Final answer
   x = 1,846.95