Finding the Fourth Proportional to 1,299.42, 1,956.76 and 936.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,299.42 : 1,956.76 = 936.72 : x
2. Step 2: Convert to fraction form
   1,299.42/1,956.76 = 936.72/x
3. Step 3: Cross multiply
   1,299.42x = 1,956.76 × 936.72
4. Step 4: Simplify right side
   1,299.42x = 1,832,933.89
5. Step 5: Solve for x
   x = 1,832,933.89/1,299.42
6. Step 6: Final answer
   x = 1,410.58