Finding the Fourth Proportional to 72.10, 108.17 and 37.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72.10 : 108.17 = 37.86 : x
2. Step 2: Convert to fraction form
   72.10/108.17 = 37.86/x
3. Step 3: Cross multiply
   72.10x = 108.17 × 37.86
4. Step 4: Simplify right side
   72.10x = 4,094.59
5. Step 5: Solve for x
   x = 4,094.59/72.10
6. Step 6: Final answer
   x = 56.79