Finding the Fourth Proportional to 72.83, 100.37 and 55.97

Step by Step Solution

1. Step 1: Write the proportion equation
   72.83 : 100.37 = 55.97 : x
2. Step 2: Convert to fraction form
   72.83/100.37 = 55.97/x
3. Step 3: Cross multiply
   72.83x = 100.37 × 55.97
4. Step 4: Simplify right side
   72.83x = 5,618.10
5. Step 5: Solve for x
   x = 5,618.10/72.83
6. Step 6: Final answer
   x = 77.15