Finding the Fourth Proportional to 2,080.89, 3,122.01 and 985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.89 : 3,122.01 = 985.50 : x
2. Step 2: Convert to fraction form
   2,080.89/3,122.01 = 985.50/x
3. Step 3: Cross multiply
   2,080.89x = 3,122.01 × 985.50
4. Step 4: Simplify right side
   2,080.89x = 3,076,740.86
5. Step 5: Solve for x
   x = 3,076,740.86/2,080.89
6. Step 6: Final answer
   x = 1,478.57