Finding the Fourth Proportional to 1,375.47, 2,061.81 and 1,211.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.47 : 2,061.81 = 1,211.46 : x
2. Step 2: Convert to fraction form
   1,375.47/2,061.81 = 1,211.46/x
3. Step 3: Cross multiply
   1,375.47x = 2,061.81 × 1,211.46
4. Step 4: Simplify right side
   1,375.47x = 2,497,800.34
5. Step 5: Solve for x
   x = 2,497,800.34/1,375.47
6. Step 6: Final answer
   x = 1,815.96