Finding the Fourth Proportional to 1,059.62, 1,590.15 and 572.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,059.62 : 1,590.15 = 572.72 : x
2. Step 2: Convert to fraction form
   1,059.62/1,590.15 = 572.72/x
3. Step 3: Cross multiply
   1,059.62x = 1,590.15 × 572.72
4. Step 4: Simplify right side
   1,059.62x = 910,710.71
5. Step 5: Solve for x
   x = 910,710.71/1,059.62
6. Step 6: Final answer
   x = 859.47