Finding the Fourth Proportional to 45.91, 68.52 and 42.29

Step by Step Solution

1. Step 1: Write the proportion equation
   45.91 : 68.52 = 42.29 : x
2. Step 2: Convert to fraction form
   45.91/68.52 = 42.29/x
3. Step 3: Cross multiply
   45.91x = 68.52 × 42.29
4. Step 4: Simplify right side
   45.91x = 2,897.71
5. Step 5: Solve for x
   x = 2,897.71/45.91
6. Step 6: Final answer
   x = 63.12