Finding the Fourth Proportional to 1,046.16, 1,567.94 and 429.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.16 : 1,567.94 = 429.53 : x
2. Step 2: Convert to fraction form
   1,046.16/1,567.94 = 429.53/x
3. Step 3: Cross multiply
   1,046.16x = 1,567.94 × 429.53
4. Step 4: Simplify right side
   1,046.16x = 673,467.28
5. Step 5: Solve for x
   x = 673,467.28/1,046.16
6. Step 6: Final answer
   x = 643.75