Finding the Fourth Proportional to 128.37, 192.50 and 37.05

Step by Step Solution

1. Step 1: Write the proportion equation
   128.37 : 192.50 = 37.05 : x
2. Step 2: Convert to fraction form
   128.37/192.50 = 37.05/x
3. Step 3: Cross multiply
   128.37x = 192.50 × 37.05
4. Step 4: Simplify right side
   128.37x = 7,131.22
5. Step 5: Solve for x
   x = 7,131.22/128.37
6. Step 6: Final answer
   x = 55.55