Finding the Fourth Proportional to 139.52, 192.48 and 100.17

Step by Step Solution

1. Step 1: Write the proportion equation
   139.52 : 192.48 = 100.17 : x
2. Step 2: Convert to fraction form
   139.52/192.48 = 100.17/x
3. Step 3: Cross multiply
   139.52x = 192.48 × 100.17
4. Step 4: Simplify right side
   139.52x = 19,280.72
5. Step 5: Solve for x
   x = 19,280.72/139.52
6. Step 6: Final answer
   x = 138.20