Finding the Fourth Proportional to 67.30, 100.49 and 58.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67.30 : 100.49 = 58.72 : x
2. Step 2: Convert to fraction form
   67.30/100.49 = 58.72/x
3. Step 3: Cross multiply
   67.30x = 100.49 × 58.72
4. Step 4: Simplify right side
   67.30x = 5,900.77
5. Step 5: Solve for x
   x = 5,900.77/67.30
6. Step 6: Final answer
   x = 87.68