Finding the Fourth Proportional to 291.83, 402.72 and 160.83

Step by Step Solution

1. Step 1: Write the proportion equation
   291.83 : 402.72 = 160.83 : x
2. Step 2: Convert to fraction form
   291.83/402.72 = 160.83/x
3. Step 3: Cross multiply
   291.83x = 402.72 × 160.83
4. Step 4: Simplify right side
   291.83x = 64,769.46
5. Step 5: Solve for x
   x = 64,769.46/291.83
6. Step 6: Final answer
   x = 221.95