Finding the Fourth Proportional to 71.84, 99.06 and 57.98

Step by Step Solution

1. Step 1: Write the proportion equation
   71.84 : 99.06 = 57.98 : x
2. Step 2: Convert to fraction form
   71.84/99.06 = 57.98/x
3. Step 3: Cross multiply
   71.84x = 99.06 × 57.98
4. Step 4: Simplify right side
   71.84x = 5,743.50
5. Step 5: Solve for x
   x = 5,743.50/71.84
6. Step 6: Final answer
   x = 79.95