Finding the Fourth Proportional to 1,012.05, 1,396.69 and 569.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,012.05 : 1,396.69 = 569.98 : x
2. Step 2: Convert to fraction form
   1,012.05/1,396.69 = 569.98/x
3. Step 3: Cross multiply
   1,012.05x = 1,396.69 × 569.98
4. Step 4: Simplify right side
   1,012.05x = 796,085.37
5. Step 5: Solve for x
   x = 796,085.37/1,012.05
6. Step 6: Final answer
   x = 786.61