Finding the Fourth Proportional to 1,059.42, 1,587.69 and 510.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.42 : 1,587.69 = 510.51 : x
2. Step 2: Convert to fraction form
   1,059.42/1,587.69 = 510.51/x
3. Step 3: Cross multiply
   1,059.42x = 1,587.69 × 510.51
4. Step 4: Simplify right side
   1,059.42x = 810,531.62
5. Step 5: Solve for x
   x = 810,531.62/1,059.42
6. Step 6: Final answer
   x = 765.07