Finding the Fourth Proportional to 2,385.29, 3,557.82 and 2,312.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.29 : 3,557.82 = 2,312.39 : x
2. Step 2: Convert to fraction form
   2,385.29/3,557.82 = 2,312.39/x
3. Step 3: Cross multiply
   2,385.29x = 3,557.82 × 2,312.39
4. Step 4: Simplify right side
   2,385.29x = 8,227,067.39
5. Step 5: Solve for x
   x = 8,227,067.39/2,385.29
6. Step 6: Final answer
   x = 3,449.08