Finding the Fourth Proportional to 1,009.95, 1,393.79 and 567.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.95 : 1,393.79 = 567.89 : x
2. Step 2: Convert to fraction form
   1,009.95/1,393.79 = 567.89/x
3. Step 3: Cross multiply
   1,009.95x = 1,393.79 × 567.89
4. Step 4: Simplify right side
   1,009.95x = 791,519.40
5. Step 5: Solve for x
   x = 791,519.40/1,009.95
6. Step 6: Final answer
   x = 783.72