Finding the Fourth Proportional to 45.98, 68.58 and 42.05

Step by Step Solution

1. Step 1: Write the proportion equation
   45.98 : 68.58 = 42.05 : x
2. Step 2: Convert to fraction form
   45.98/68.58 = 42.05/x
3. Step 3: Cross multiply
   45.98x = 68.58 × 42.05
4. Step 4: Simplify right side
   45.98x = 2,883.45
5. Step 5: Solve for x
   x = 2,883.45/45.98
6. Step 6: Final answer
   x = 62.72