Finding the Fourth Proportional to 1,046.17, 1,568.72 and 429.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.17 : 1,568.72 = 429.76 : x
2. Step 2: Convert to fraction form
   1,046.17/1,568.72 = 429.76/x
3. Step 3: Cross multiply
   1,046.17x = 1,568.72 × 429.76
4. Step 4: Simplify right side
   1,046.17x = 674,170.96
5. Step 5: Solve for x
   x = 674,170.96/1,046.17
6. Step 6: Final answer
   x = 644.42