Finding the Fourth Proportional to 1,386.34, 2,076.63 and 1,077.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.34 : 2,076.63 = 1,077.10 : x
2. Step 2: Convert to fraction form
   1,386.34/2,076.63 = 1,077.10/x
3. Step 3: Cross multiply
   1,386.34x = 2,076.63 × 1,077.10
4. Step 4: Simplify right side
   1,386.34x = 2,236,738.17
5. Step 5: Solve for x
   x = 2,236,738.17/1,386.34
6. Step 6: Final answer
   x = 1,613.41