Finding the Fourth Proportional to 900.72, 1,341.20 and 890.94

Step by Step Solution

1. Step 1: Write the proportion equation
   900.72 : 1,341.20 = 890.94 : x
2. Step 2: Convert to fraction form
   900.72/1,341.20 = 890.94/x
3. Step 3: Cross multiply
   900.72x = 1,341.20 × 890.94
4. Step 4: Simplify right side
   900.72x = 1,194,924.27
5. Step 5: Solve for x
   x = 1,194,924.27/900.72
6. Step 6: Final answer
   x = 1,326.63