Finding the Fourth Proportional to 73.98, 111.12 and 45.10

Step by Step Solution

1. Step 1: Write the proportion equation
   73.98 : 111.12 = 45.10 : x
2. Step 2: Convert to fraction form
   73.98/111.12 = 45.10/x
3. Step 3: Cross multiply
   73.98x = 111.12 × 45.10
4. Step 4: Simplify right side
   73.98x = 5,011.51
5. Step 5: Solve for x
   x = 5,011.51/73.98
6. Step 6: Final answer
   x = 67.75