Finding the Fourth Proportional to 1,941.90, 2,679.81 and 1,145.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,941.90 : 2,679.81 = 1,145.10 : x
2. Step 2: Convert to fraction form
   1,941.90/2,679.81 = 1,145.10/x
3. Step 3: Cross multiply
   1,941.90x = 2,679.81 × 1,145.10
4. Step 4: Simplify right side
   1,941.90x = 3,068,650.43
5. Step 5: Solve for x
   x = 3,068,650.43/1,941.90
6. Step 6: Final answer
   x = 1,580.23