Finding the Fourth Proportional to 1,031.61, 1,423.62 and 559.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,031.61 : 1,423.62 = 559.50 : x
2. Step 2: Convert to fraction form
   1,031.61/1,423.62 = 559.50/x
3. Step 3: Cross multiply
   1,031.61x = 1,423.62 × 559.50
4. Step 4: Simplify right side
   1,031.61x = 796,518.95
5. Step 5: Solve for x
   x = 796,518.95/1,031.61
6. Step 6: Final answer
   x = 772.12