Finding the Fourth Proportional to 81.98, 123.17 and 45.93

Step by Step Solution

1. Step 1: Write the proportion equation
   81.98 : 123.17 = 45.93 : x
2. Step 2: Convert to fraction form
   81.98/123.17 = 45.93/x
3. Step 3: Cross multiply
   81.98x = 123.17 × 45.93
4. Step 4: Simplify right side
   81.98x = 5,657.69
5. Step 5: Solve for x
   x = 5,657.69/81.98
6. Step 6: Final answer
   x = 69.01