Finding the Fourth Proportional to 100.50, 150.58 and 67.99

Step by Step Solution

1. Step 1: Write the proportion equation
   100.50 : 150.58 = 67.99 : x
2. Step 2: Convert to fraction form
   100.50/150.58 = 67.99/x
3. Step 3: Cross multiply
   100.50x = 150.58 × 67.99
4. Step 4: Simplify right side
   100.50x = 10,237.93
5. Step 5: Solve for x
   x = 10,237.93/100.50
6. Step 6: Final answer
   x = 101.87