Finding the Fourth Proportional to 1,011.89, 1,396.37 and 569.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.89 : 1,396.37 = 569.77 : x
2. Step 2: Convert to fraction form
   1,011.89/1,396.37 = 569.77/x
3. Step 3: Cross multiply
   1,011.89x = 1,396.37 × 569.77
4. Step 4: Simplify right side
   1,011.89x = 795,607.67
5. Step 5: Solve for x
   x = 795,607.67/1,011.89
6. Step 6: Final answer
   x = 786.26