Finding the Fourth Proportional to 2,132.78, 2,941.57 and 1,386.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,132.78 : 2,941.57 = 1,386.98 : x
2. Step 2: Convert to fraction form
   2,132.78/2,941.57 = 1,386.98/x
3. Step 3: Cross multiply
   2,132.78x = 2,941.57 × 1,386.98
4. Step 4: Simplify right side
   2,132.78x = 4,079,898.76
5. Step 5: Solve for x
   x = 4,079,898.76/2,132.78
6. Step 6: Final answer
   x = 1,912.95