Finding the Fourth Proportional to 1,557.69, 2,329.58 and 1,385.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.69 : 2,329.58 = 1,385.43 : x
2. Step 2: Convert to fraction form
   1,557.69/2,329.58 = 1,385.43/x
3. Step 3: Cross multiply
   1,557.69x = 2,329.58 × 1,385.43
4. Step 4: Simplify right side
   1,557.69x = 3,227,463.09
5. Step 5: Solve for x
   x = 3,227,463.09/1,557.69
6. Step 6: Final answer
   x = 2,071.95