Finding the Fourth Proportional to 1,410.31, 1,945.04 and 1,057.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.31 : 1,945.04 = 1,057.06 : x
2. Step 2: Convert to fraction form
   1,410.31/1,945.04 = 1,057.06/x
3. Step 3: Cross multiply
   1,410.31x = 1,945.04 × 1,057.06
4. Step 4: Simplify right side
   1,410.31x = 2,056,023.98
5. Step 5: Solve for x
   x = 2,056,023.98/1,410.31
6. Step 6: Final answer
   x = 1,457.85