Finding the Fourth Proportional to 1,386.30, 2,077.89 and 606.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,386.30 : 2,077.89 = 606.06 : x
2. Step 2: Convert to fraction form
   1,386.30/2,077.89 = 606.06/x
3. Step 3: Cross multiply
   1,386.30x = 2,077.89 × 606.06
4. Step 4: Simplify right side
   1,386.30x = 1,259,326.01
5. Step 5: Solve for x
   x = 1,259,326.01/1,386.30
6. Step 6: Final answer
   x = 908.41