Finding the Fourth Proportional to 1,727.82, 2,591.73 and 429.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,727.82 : 2,591.73 = 429.30 : x
2. Step 2: Convert to fraction form
   1,727.82/2,591.73 = 429.30/x
3. Step 3: Cross multiply
   1,727.82x = 2,591.73 × 429.30
4. Step 4: Simplify right side
   1,727.82x = 1,112,629.69
5. Step 5: Solve for x
   x = 1,112,629.69/1,727.82
6. Step 6: Final answer
   x = 643.95