Finding the Fourth Proportional to 931.82, 1,285.83 and 538.86

Step by Step Solution

1. Step 1: Write the proportion equation
   931.82 : 1,285.83 = 538.86 : x
2. Step 2: Convert to fraction form
   931.82/1,285.83 = 538.86/x
3. Step 3: Cross multiply
   931.82x = 1,285.83 × 538.86
4. Step 4: Simplify right side
   931.82x = 692,885.15
5. Step 5: Solve for x
   x = 692,885.15/931.82
6. Step 6: Final answer
   x = 743.59