Finding the Fourth Proportional to 2,501.79, 3,748.56 and 857.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,501.79 : 3,748.56 = 857.43 : x
2. Step 2: Convert to fraction form
   2,501.79/3,748.56 = 857.43/x
3. Step 3: Cross multiply
   2,501.79x = 3,748.56 × 857.43
4. Step 4: Simplify right side
   2,501.79x = 3,214,127.80
5. Step 5: Solve for x
   x = 3,214,127.80/2,501.79
6. Step 6: Final answer
   x = 1,284.73