Finding the Fourth Proportional to 1,457.99, 2,011.39 and 985.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,457.99 : 2,011.39 = 985.72 : x
2. Step 2: Convert to fraction form
   1,457.99/2,011.39 = 985.72/x
3. Step 3: Cross multiply
   1,457.99x = 2,011.39 × 985.72
4. Step 4: Simplify right side
   1,457.99x = 1,982,667.35
5. Step 5: Solve for x
   x = 1,982,667.35/1,457.99
6. Step 6: Final answer
   x = 1,359.86