Finding the Fourth Proportional to 1,386.81, 2,074.29 and 1,016.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.81 : 2,074.29 = 1,016.84 : x
2. Step 2: Convert to fraction form
   1,386.81/2,074.29 = 1,016.84/x
3. Step 3: Cross multiply
   1,386.81x = 2,074.29 × 1,016.84
4. Step 4: Simplify right side
   1,386.81x = 2,109,221.04
5. Step 5: Solve for x
   x = 2,109,221.04/1,386.81
6. Step 6: Final answer
   x = 1,520.92