Finding the Fourth Proportional to 1,980.15, 2,732.61 and 1,083.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.15 : 2,732.61 = 1,083.91 : x
2. Step 2: Convert to fraction form
   1,980.15/2,732.61 = 1,083.91/x
3. Step 3: Cross multiply
   1,980.15x = 2,732.61 × 1,083.91
4. Step 4: Simplify right side
   1,980.15x = 2,961,903.31
5. Step 5: Solve for x
   x = 2,961,903.31/1,980.15
6. Step 6: Final answer
   x = 1,495.80