Finding the Fourth Proportional to 97.98, 146.78 and 70.86

Step by Step Solution

1. Step 1: Write the proportion equation
   97.98 : 146.78 = 70.86 : x
2. Step 2: Convert to fraction form
   97.98/146.78 = 70.86/x
3. Step 3: Cross multiply
   97.98x = 146.78 × 70.86
4. Step 4: Simplify right side
   97.98x = 10,400.83
5. Step 5: Solve for x
   x = 10,400.83/97.98
6. Step 6: Final answer
   x = 106.15