Finding the Fourth Proportional to 1,386.68, 2,077.86 and 1,114.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.68 : 2,077.86 = 1,114.52 : x
2. Step 2: Convert to fraction form
   1,386.68/2,077.86 = 1,114.52/x
3. Step 3: Cross multiply
   1,386.68x = 2,077.86 × 1,114.52
4. Step 4: Simplify right side
   1,386.68x = 2,315,816.53
5. Step 5: Solve for x
   x = 2,315,816.53/1,386.68
6. Step 6: Final answer
   x = 1,670.04