Finding the Fourth Proportional to 2,141.43, 2,953.80 and 1,386.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.43 : 2,953.80 = 1,386.19 : x
2. Step 2: Convert to fraction form
   2,141.43/2,953.80 = 1,386.19/x
3. Step 3: Cross multiply
   2,141.43x = 2,953.80 × 1,386.19
4. Step 4: Simplify right side
   2,141.43x = 4,094,528.02
5. Step 5: Solve for x
   x = 4,094,528.02/2,141.43
6. Step 6: Final answer
   x = 1,912.05