Finding the Fourth Proportional to 168.83, 253.34 and 128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   168.83 : 253.34 = 128.50 : x
2. Step 2: Convert to fraction form
   168.83/253.34 = 128.50/x
3. Step 3: Cross multiply
   168.83x = 253.34 × 128.50
4. Step 4: Simplify right side
   168.83x = 32,554.19
5. Step 5: Solve for x
   x = 32,554.19/168.83
6. Step 6: Final answer
   x = 192.82