Finding the Fourth Proportional to 1,051.69, 1,451.28 and 579.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,051.69 : 1,451.28 = 579.57 : x
2. Step 2: Convert to fraction form
   1,051.69/1,451.28 = 579.57/x
3. Step 3: Cross multiply
   1,051.69x = 1,451.28 × 579.57
4. Step 4: Simplify right side
   1,051.69x = 841,118.35
5. Step 5: Solve for x
   x = 841,118.35/1,051.69
6. Step 6: Final answer
   x = 799.78