Finding the Fourth Proportional to 71.50, 98.58 and 59.00

Step by Step Solution

1. Step 1: Write the proportion equation
   71.50 : 98.58 = 59.00 : x
2. Step 2: Convert to fraction form
   71.50/98.58 = 59.00/x
3. Step 3: Cross multiply
   71.50x = 98.58 × 59.00
4. Step 4: Simplify right side
   71.50x = 5,816.53
5. Step 5: Solve for x
   x = 5,816.53/71.50
6. Step 6: Final answer
   x = 81.36