Finding the Fourth Proportional to 111.63, 154.03 and 65.00

Step by Step Solution

1. Step 1: Write the proportion equation
   111.63 : 154.03 = 65.00 : x
2. Step 2: Convert to fraction form
   111.63/154.03 = 65.00/x
3. Step 3: Cross multiply
   111.63x = 154.03 × 65.00
4. Step 4: Simplify right side
   111.63x = 10,012.17
5. Step 5: Solve for x
   x = 10,012.17/111.63
6. Step 6: Final answer
   x = 89.69