Finding the Fourth Proportional to 1,314.73, 1,814.69 and 921.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.73 : 1,814.69 = 921.85 : x
2. Step 2: Convert to fraction form
   1,314.73/1,814.69 = 921.85/x
3. Step 3: Cross multiply
   1,314.73x = 1,814.69 × 921.85
4. Step 4: Simplify right side
   1,314.73x = 1,672,871.98
5. Step 5: Solve for x
   x = 1,672,871.98/1,314.73
6. Step 6: Final answer
   x = 1,272.41