Finding the Fourth Proportional to 1,403.32, 2,104.82 and 429.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.32 : 2,104.82 = 429.43 : x
2. Step 2: Convert to fraction form
   1,403.32/2,104.82 = 429.43/x
3. Step 3: Cross multiply
   1,403.32x = 2,104.82 × 429.43
4. Step 4: Simplify right side
   1,403.32x = 903,870.71
5. Step 5: Solve for x
   x = 903,870.71/1,403.32
6. Step 6: Final answer
   x = 644.09