Finding the Fourth Proportional to 128.89, 193.38 and 37.60

Step by Step Solution

1. Step 1: Write the proportion equation
   128.89 : 193.38 = 37.60 : x
2. Step 2: Convert to fraction form
   128.89/193.38 = 37.60/x
3. Step 3: Cross multiply
   128.89x = 193.38 × 37.60
4. Step 4: Simplify right side
   128.89x = 7,271.82
5. Step 5: Solve for x
   x = 7,271.82/128.89
6. Step 6: Final answer
   x = 56.42