Finding the Fourth Proportional to 1,011.50, 1,395.72 and 591.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011.50 : 1,395.72 = 591.92 : x
2. Step 2: Convert to fraction form
   1,011.50/1,395.72 = 591.92/x
3. Step 3: Cross multiply
   1,011.50x = 1,395.72 × 591.92
4. Step 4: Simplify right side
   1,011.50x = 826,154.58
5. Step 5: Solve for x
   x = 826,154.58/1,011.50
6. Step 6: Final answer
   x = 816.76