Finding the Fourth Proportional to 1,341.36, 1,852.20 and 900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,341.36 : 1,852.20 = 900.72 : x
2. Step 2: Convert to fraction form
   1,341.36/1,852.20 = 900.72/x
3. Step 3: Cross multiply
   1,341.36x = 1,852.20 × 900.72
4. Step 4: Simplify right side
   1,341.36x = 1,668,313.58
5. Step 5: Solve for x
   x = 1,668,313.58/1,341.36
6. Step 6: Final answer
   x = 1,243.75