Finding the Fourth Proportional to 168.56, 253.32 and 100.10

Step by Step Solution

1. Step 1: Write the proportion equation
   168.56 : 253.32 = 100.10 : x
2. Step 2: Convert to fraction form
   168.56/253.32 = 100.10/x
3. Step 3: Cross multiply
   168.56x = 253.32 × 100.10
4. Step 4: Simplify right side
   168.56x = 25,355.56
5. Step 5: Solve for x
   x = 25,355.56/168.56
6. Step 6: Final answer
   x = 150.42