Finding the Fourth Proportional to 2,128.47, 2,937.87 and 1,382.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.47 : 2,937.87 = 1,382.39 : x
2. Step 2: Convert to fraction form
   2,128.47/2,937.87 = 1,382.39/x
3. Step 3: Cross multiply
   2,128.47x = 2,937.87 × 1,382.39
4. Step 4: Simplify right side
   2,128.47x = 4,061,282.11
5. Step 5: Solve for x
   x = 4,061,282.11/2,128.47
6. Step 6: Final answer
   x = 1,908.08