Finding the Fourth Proportional to 55.50, 83.28 and 42.00

Step by Step Solution

1. Step 1: Write the proportion equation
   55.50 : 83.28 = 42.00 : x
2. Step 2: Convert to fraction form
   55.50/83.28 = 42.00/x
3. Step 3: Cross multiply
   55.50x = 83.28 × 42.00
4. Step 4: Simplify right side
   55.50x = 3,497.61
5. Step 5: Solve for x
   x = 3,497.61/55.50
6. Step 6: Final answer
   x = 63.02