Finding the Fourth Proportional to 82.60, 123.71 and 43.98

Step by Step Solution

1. Step 1: Write the proportion equation
   82.60 : 123.71 = 43.98 : x
2. Step 2: Convert to fraction form
   82.60/123.71 = 43.98/x
3. Step 3: Cross multiply
   82.60x = 123.71 × 43.98
4. Step 4: Simplify right side
   82.60x = 5,440.77
5. Step 5: Solve for x
   x = 5,440.77/82.60
6. Step 6: Final answer
   x = 65.87