Finding the Fourth Proportional to 1,545.09, 2,131.61 and 985.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,545.09 : 2,131.61 = 985.46 : x
2. Step 2: Convert to fraction form
   1,545.09/2,131.61 = 985.46/x
3. Step 3: Cross multiply
   1,545.09x = 2,131.61 × 985.46
4. Step 4: Simplify right side
   1,545.09x = 2,100,600.81
5. Step 5: Solve for x
   x = 2,100,600.81/1,545.09
6. Step 6: Final answer
   x = 1,359.53