Finding the Fourth Proportional to 1,412.56, 1,947.16 and 991.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.56 : 1,947.16 = 991.73 : x
2. Step 2: Convert to fraction form
   1,412.56/1,947.16 = 991.73/x
3. Step 3: Cross multiply
   1,412.56x = 1,947.16 × 991.73
4. Step 4: Simplify right side
   1,412.56x = 1,931,049.73
5. Step 5: Solve for x
   x = 1,931,049.73/1,412.56
6. Step 6: Final answer
   x = 1,367.06