Finding the Fourth Proportional to 1,020.59, 1,529.49 and 557.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,020.59 : 1,529.49 = 557.67 : x
2. Step 2: Convert to fraction form
   1,020.59/1,529.49 = 557.67/x
3. Step 3: Cross multiply
   1,020.59x = 1,529.49 × 557.67
4. Step 4: Simplify right side
   1,020.59x = 852,950.69
5. Step 5: Solve for x
   x = 852,950.69/1,020.59
6. Step 6: Final answer
   x = 835.75