Finding the Fourth Proportional to 1,222.76, 1,833.42 and 491.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.76 : 1,833.42 = 491.72 : x
2. Step 2: Convert to fraction form
   1,222.76/1,833.42 = 491.72/x
3. Step 3: Cross multiply
   1,222.76x = 1,833.42 × 491.72
4. Step 4: Simplify right side
   1,222.76x = 901,529.28
5. Step 5: Solve for x
   x = 901,529.28/1,222.76
6. Step 6: Final answer
   x = 737.29