Finding the Fourth Proportional to 82.31, 113.59 and 45.47

Step by Step Solution

1. Step 1: Write the proportion equation
   82.31 : 113.59 = 45.47 : x
2. Step 2: Convert to fraction form
   82.31/113.59 = 45.47/x
3. Step 3: Cross multiply
   82.31x = 113.59 × 45.47
4. Step 4: Simplify right side
   82.31x = 5,164.71
5. Step 5: Solve for x
   x = 5,164.71/82.31
6. Step 6: Final answer
   x = 62.75