Finding the Fourth Proportional to 1,557.85, 2,329.89 and 1,385.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.85 : 2,329.89 = 1,385.73 : x
2. Step 2: Convert to fraction form
   1,557.85/2,329.89 = 1,385.73/x
3. Step 3: Cross multiply
   1,557.85x = 2,329.89 × 1,385.73
4. Step 4: Simplify right side
   1,557.85x = 3,228,598.47
5. Step 5: Solve for x
   x = 3,228,598.47/1,557.85
6. Step 6: Final answer
   x = 2,072.47