Finding the Fourth Proportional to 67.86, 101.31 and 61.48

Step by Step Solution

1. Step 1: Write the proportion equation
   67.86 : 101.31 = 61.48 : x
2. Step 2: Convert to fraction form
   67.86/101.31 = 61.48/x
3. Step 3: Cross multiply
   67.86x = 101.31 × 61.48
4. Step 4: Simplify right side
   67.86x = 6,228.78
5. Step 5: Solve for x
   x = 6,228.78/67.86
6. Step 6: Final answer
   x = 91.79