Finding the Fourth Proportional to 71.47, 107.34 and 45.82

Step by Step Solution

1. Step 1: Write the proportion equation
   71.47 : 107.34 = 45.82 : x
2. Step 2: Convert to fraction form
   71.47/107.34 = 45.82/x
3. Step 3: Cross multiply
   71.47x = 107.34 × 45.82
4. Step 4: Simplify right side
   71.47x = 4,918.32
5. Step 5: Solve for x
   x = 4,918.32/71.47
6. Step 6: Final answer
   x = 68.82