Finding the Fourth Proportional to 1,059.59, 1,587.76 and 572.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.59 : 1,587.76 = 572.51 : x
2. Step 2: Convert to fraction form
   1,059.59/1,587.76 = 572.51/x
3. Step 3: Cross multiply
   1,059.59x = 1,587.76 × 572.51
4. Step 4: Simplify right side
   1,059.59x = 909,008.48
5. Step 5: Solve for x
   x = 909,008.48/1,059.59
6. Step 6: Final answer
   x = 857.89