Finding the Fourth Proportional to 100.10, 140.50 and 100.10

Step by Step Solution

1. Step 1: Write the proportion equation
   100.10 : 140.50 = 100.10 : x
2. Step 2: Convert to fraction form
   100.10/140.50 = 100.10/x
3. Step 3: Cross multiply
   100.10x = 140.50 × 100.10
4. Step 4: Simplify right side
   100.10x = 14,064.05
5. Step 5: Solve for x
   x = 14,064.05/100.10
6. Step 6: Final answer
   x = 140.50