Finding the Fourth Proportional to 1,131.36, 1,694.76 and 900.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.36 : 1,694.76 = 900.60 : x
2. Step 2: Convert to fraction form
   1,131.36/1,694.76 = 900.60/x
3. Step 3: Cross multiply
   1,131.36x = 1,694.76 × 900.60
4. Step 4: Simplify right side
   1,131.36x = 1,526,300.86
5. Step 5: Solve for x
   x = 1,526,300.86/1,131.36
6. Step 6: Final answer
   x = 1,349.09