Finding the Fourth Proportional to 1,339.89, 2,006.06 and 906.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.89 : 2,006.06 = 906.27 : x
2. Step 2: Convert to fraction form
   1,339.89/2,006.06 = 906.27/x
3. Step 3: Cross multiply
   1,339.89x = 2,006.06 × 906.27
4. Step 4: Simplify right side
   1,339.89x = 1,818,027.46
5. Step 5: Solve for x
   x = 1,818,027.46/1,339.89
6. Step 6: Final answer
   x = 1,356.85