Finding the Fourth Proportional to 900.69, 1,359.05 and 900.69

Step by Step Solution

1. Step 1: Write the proportion equation
   900.69 : 1,359.05 = 900.69 : x
2. Step 2: Convert to fraction form
   900.69/1,359.05 = 900.69/x
3. Step 3: Cross multiply
   900.69x = 1,359.05 × 900.69
4. Step 4: Simplify right side
   900.69x = 1,224,078.24
5. Step 5: Solve for x
   x = 1,224,078.24/900.69
6. Step 6: Final answer
   x = 1,359.05