Finding the Fourth Proportional to 89.83, 134.69 and 53.34

Step by Step Solution

1. Step 1: Write the proportion equation
   89.83 : 134.69 = 53.34 : x
2. Step 2: Convert to fraction form
   89.83/134.69 = 53.34/x
3. Step 3: Cross multiply
   89.83x = 134.69 × 53.34
4. Step 4: Simplify right side
   89.83x = 7,184.36
5. Step 5: Solve for x
   x = 7,184.36/89.83
6. Step 6: Final answer
   x = 79.98