Finding the Fourth Proportional to 139.98, 193.27 and 90.93

Step by Step Solution

1. Step 1: Write the proportion equation
   139.98 : 193.27 = 90.93 : x
2. Step 2: Convert to fraction form
   139.98/193.27 = 90.93/x
3. Step 3: Cross multiply
   139.98x = 193.27 × 90.93
4. Step 4: Simplify right side
   139.98x = 17,574.71
5. Step 5: Solve for x
   x = 17,574.71/139.98
6. Step 6: Final answer
   x = 125.55