Finding the Fourth Proportional to 1,369.18, 2,051.16 and 905.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,369.18 : 2,051.16 = 905.59 : x
2. Step 2: Convert to fraction form
   1,369.18/2,051.16 = 905.59/x
3. Step 3: Cross multiply
   1,369.18x = 2,051.16 × 905.59
4. Step 4: Simplify right side
   1,369.18x = 1,857,509.15
5. Step 5: Solve for x
   x = 1,857,509.15/1,369.18
6. Step 6: Final answer
   x = 1,356.66