Finding the Fourth Proportional to 1,352.70, 1,865.43 and 1,057.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.70 : 1,865.43 = 1,057.86 : x
2. Step 2: Convert to fraction form
   1,352.70/1,865.43 = 1,057.86/x
3. Step 3: Cross multiply
   1,352.70x = 1,865.43 × 1,057.86
4. Step 4: Simplify right side
   1,352.70x = 1,973,363.78
5. Step 5: Solve for x
   x = 1,973,363.78/1,352.70
6. Step 6: Final answer
   x = 1,458.83