Finding the Fourth Proportional to 1,941.31, 2,678.93 and 1,057.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,941.31 : 2,678.93 = 1,057.10 : x
2. Step 2: Convert to fraction form
   1,941.31/2,678.93 = 1,057.10/x
3. Step 3: Cross multiply
   1,941.31x = 2,678.93 × 1,057.10
4. Step 4: Simplify right side
   1,941.31x = 2,831,886.15
5. Step 5: Solve for x
   x = 2,831,886.15/1,941.31
6. Step 6: Final answer
   x = 1,458.75