Finding the Fourth Proportional to 1,980.83, 2,734.79 and 1,272.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.83 : 2,734.79 = 1,272.99 : x
2. Step 2: Convert to fraction form
   1,980.83/2,734.79 = 1,272.99/x
3. Step 3: Cross multiply
   1,980.83x = 2,734.79 × 1,272.99
4. Step 4: Simplify right side
   1,980.83x = 3,481,360.32
5. Step 5: Solve for x
   x = 3,481,360.32/1,980.83
6. Step 6: Final answer
   x = 1,757.53