Finding the Fourth Proportional to 1,443.69, 2,165.52 and 348.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.69 : 2,165.52 = 348.05 : x
2. Step 2: Convert to fraction form
   1,443.69/2,165.52 = 348.05/x
3. Step 3: Cross multiply
   1,443.69x = 2,165.52 × 348.05
4. Step 4: Simplify right side
   1,443.69x = 753,703.28
5. Step 5: Solve for x
   x = 753,703.28/1,443.69
6. Step 6: Final answer
   x = 522.07