Finding the Fourth Proportional to 72.63, 100.17 and 58.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72.63 : 100.17 = 58.86 : x
2. Step 2: Convert to fraction form
   72.63/100.17 = 58.86/x
3. Step 3: Cross multiply
   72.63x = 100.17 × 58.86
4. Step 4: Simplify right side
   72.63x = 5,896.01
5. Step 5: Solve for x
   x = 5,896.01/72.63
6. Step 6: Final answer
   x = 81.18