Finding the Fourth Proportional to 2,124.72, 2,930.40 and 1,379.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,124.72 : 2,930.40 = 1,379.32 : x
2. Step 2: Convert to fraction form
   2,124.72/2,930.40 = 1,379.32/x
3. Step 3: Cross multiply
   2,124.72x = 2,930.40 × 1,379.32
4. Step 4: Simplify right side
   2,124.72x = 4,041,959.33
5. Step 5: Solve for x
   x = 4,041,959.33/2,124.72
6. Step 6: Final answer
   x = 1,902.35