Finding the Fourth Proportional to 1,545.57, 2,128.23 and 1,335.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,545.57 : 2,128.23 = 1,335.37 : x
2. Step 2: Convert to fraction form
   1,545.57/2,128.23 = 1,335.37/x
3. Step 3: Cross multiply
   1,545.57x = 2,128.23 × 1,335.37
4. Step 4: Simplify right side
   1,545.57x = 2,841,974.50
5. Step 5: Solve for x
   x = 2,841,974.50/1,545.57
6. Step 6: Final answer
   x = 1,838.79