Finding the Fourth Proportional to 1,662.56, 2,493.82 and 429.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.56 : 2,493.82 = 429.87 : x
2. Step 2: Convert to fraction form
   1,662.56/2,493.82 = 429.87/x
3. Step 3: Cross multiply
   1,662.56x = 2,493.82 × 429.87
4. Step 4: Simplify right side
   1,662.56x = 1,072,016.25
5. Step 5: Solve for x
   x = 1,072,016.25/1,662.56
6. Step 6: Final answer
   x = 644.80