Finding the Fourth Proportional to 139.83, 192.86 and 98.37

Step by Step Solution

1. Step 1: Write the proportion equation
   139.83 : 192.86 = 98.37 : x
2. Step 2: Convert to fraction form
   139.83/192.86 = 98.37/x
3. Step 3: Cross multiply
   139.83x = 192.86 × 98.37
4. Step 4: Simplify right side
   139.83x = 18,971.15
5. Step 5: Solve for x
   x = 18,971.15/139.83
6. Step 6: Final answer
   x = 135.67