Finding the Fourth Proportional to 1,809.68, 2,710.20 and 986.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,809.68 : 2,710.20 = 986.72 : x
2. Step 2: Convert to fraction form
   1,809.68/2,710.20 = 986.72/x
3. Step 3: Cross multiply
   1,809.68x = 2,710.20 × 986.72
4. Step 4: Simplify right side
   1,809.68x = 2,674,208.54
5. Step 5: Solve for x
   x = 2,674,208.54/1,809.68
6. Step 6: Final answer
   x = 1,477.72