Finding the Fourth Proportional to 139.46, 192.24 and 100.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139.46 : 192.24 = 100.10 : x
2. Step 2: Convert to fraction form
   139.46/192.24 = 100.10/x
3. Step 3: Cross multiply
   139.46x = 192.24 × 100.10
4. Step 4: Simplify right side
   139.46x = 19,242.26
5. Step 5: Solve for x
   x = 19,242.26/139.46
6. Step 6: Final answer
   x = 137.98