Finding the Fourth Proportional to 1,342.57, 1,853.38 and 900.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.57 : 1,853.38 = 900.76 : x
2. Step 2: Convert to fraction form
   1,342.57/1,853.38 = 900.76/x
3. Step 3: Cross multiply
   1,342.57x = 1,853.38 × 900.76
4. Step 4: Simplify right side
   1,342.57x = 1,669,450.57
5. Step 5: Solve for x
   x = 1,669,450.57/1,342.57
6. Step 6: Final answer
   x = 1,243.47