Finding the Fourth Proportional to 128.00, 191.82 and 67.01

Step by Step Solution

1. Step 1: Write the proportion equation
   128.00 : 191.82 = 67.01 : x
2. Step 2: Convert to fraction form
   128.00/191.82 = 67.01/x
3. Step 3: Cross multiply
   128.00x = 191.82 × 67.01
4. Step 4: Simplify right side
   128.00x = 12,852.90
5. Step 5: Solve for x
   x = 12,852.90/128.00
6. Step 6: Final answer
   x = 100.42