Finding the Fourth Proportional to 45.98, 68.86 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   45.98 : 68.86 = 42.18 : x
2. Step 2: Convert to fraction form
   45.98/68.86 = 42.18/x
3. Step 3: Cross multiply
   45.98x = 68.86 × 42.18
4. Step 4: Simplify right side
   45.98x = 2,904.51
5. Step 5: Solve for x
   x = 2,904.51/45.98
6. Step 6: Final answer
   x = 63.17