Finding the Fourth Proportional to 1,545.14, 2,131.89 and 881.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,545.14 : 2,131.89 = 881.87 : x
2. Step 2: Convert to fraction form
   1,545.14/2,131.89 = 881.87/x
3. Step 3: Cross multiply
   1,545.14x = 2,131.89 × 881.87
4. Step 4: Simplify right side
   1,545.14x = 1,880,035.87
5. Step 5: Solve for x
   x = 1,880,035.87/1,545.14
6. Step 6: Final answer
   x = 1,216.74