Finding the Fourth Proportional to 113.63, 156.82 and 64.52

Step by Step Solution

1. Step 1: Write the proportion equation
   113.63 : 156.82 = 64.52 : x
2. Step 2: Convert to fraction form
   113.63/156.82 = 64.52/x
3. Step 3: Cross multiply
   113.63x = 156.82 × 64.52
4. Step 4: Simplify right side
   113.63x = 10,118.23
5. Step 5: Solve for x
   x = 10,118.23/113.63
6. Step 6: Final answer
   x = 89.05