Finding the Fourth Proportional to 1,590.56, 2,385.82 and 712.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,590.56 : 2,385.82 = 712.83 : x
2. Step 2: Convert to fraction form
   1,590.56/2,385.82 = 712.83/x
3. Step 3: Cross multiply
   1,590.56x = 2,385.82 × 712.83
4. Step 4: Simplify right side
   1,590.56x = 1,700,684.07
5. Step 5: Solve for x
   x = 1,700,684.07/1,590.56
6. Step 6: Final answer
   x = 1,069.24