Finding the Fourth Proportional to 45.34, 68.01 and 42.31

Step by Step Solution

1. Step 1: Write the proportion equation
   45.34 : 68.01 = 42.31 : x
2. Step 2: Convert to fraction form
   45.34/68.01 = 42.31/x
3. Step 3: Cross multiply
   45.34x = 68.01 × 42.31
4. Step 4: Simplify right side
   45.34x = 2,877.50
5. Step 5: Solve for x
   x = 2,877.50/45.34
6. Step 6: Final answer
   x = 63.47