Finding the Fourth Proportional to 1,772.54, 2,656.38 and 905.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,772.54 : 2,656.38 = 905.03 : x
2. Step 2: Convert to fraction form
   1,772.54/2,656.38 = 905.03/x
3. Step 3: Cross multiply
   1,772.54x = 2,656.38 × 905.03
4. Step 4: Simplify right side
   1,772.54x = 2,404,103.59
5. Step 5: Solve for x
   x = 2,404,103.59/1,772.54
6. Step 6: Final answer
   x = 1,356.30