Finding the Fourth Proportional to 1,458.06, 2,011.46 and 985.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,458.06 : 2,011.46 = 985.80 : x
2. Step 2: Convert to fraction form
   1,458.06/2,011.46 = 985.80/x
3. Step 3: Cross multiply
   1,458.06x = 2,011.46 × 985.80
4. Step 4: Simplify right side
   1,458.06x = 1,982,897.27
5. Step 5: Solve for x
   x = 1,982,897.27/1,458.06
6. Step 6: Final answer
   x = 1,359.96