Finding the Fourth Proportional to 1,053.02, 1,570.78 and 936.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.02 : 1,570.78 = 936.38 : x
2. Step 2: Convert to fraction form
   1,053.02/1,570.78 = 936.38/x
3. Step 3: Cross multiply
   1,053.02x = 1,570.78 × 936.38
4. Step 4: Simplify right side
   1,053.02x = 1,470,846.98
5. Step 5: Solve for x
   x = 1,470,846.98/1,053.02
6. Step 6: Final answer
   x = 1,396.79