Finding the Fourth Proportional to 1,386.24, 2,077.43 and 1,076.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.24 : 2,077.43 = 1,076.69 : x
2. Step 2: Convert to fraction form
   1,386.24/2,077.43 = 1,076.69/x
3. Step 3: Cross multiply
   1,386.24x = 2,077.43 × 1,076.69
4. Step 4: Simplify right side
   1,386.24x = 2,236,732.34
5. Step 5: Solve for x
   x = 2,236,732.34/1,386.24
6. Step 6: Final answer
   x = 1,613.52