Finding the Fourth Proportional to 71.31, 107.00 and 45.69

Step by Step Solution

1. Step 1: Write the proportion equation
   71.31 : 107.00 = 45.69 : x
2. Step 2: Convert to fraction form
   71.31/107.00 = 45.69/x
3. Step 3: Cross multiply
   71.31x = 107.00 × 45.69
4. Step 4: Simplify right side
   71.31x = 4,888.54
5. Step 5: Solve for x
   x = 4,888.54/71.31
6. Step 6: Final answer
   x = 68.56