Finding the Fourth Proportional to 67.47, 100.74 and 57.83

Step by Step Solution

1. Step 1: Write the proportion equation
   67.47 : 100.74 = 57.83 : x
2. Step 2: Convert to fraction form
   67.47/100.74 = 57.83/x
3. Step 3: Cross multiply
   67.47x = 100.74 × 57.83
4. Step 4: Simplify right side
   67.47x = 5,825.29
5. Step 5: Solve for x
   x = 5,825.29/67.47
6. Step 6: Final answer
   x = 86.34