Finding the Fourth Proportional to 1,980.74, 2,732.23 and 1,308.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.74 : 2,732.23 = 1,308.55 : x
2. Step 2: Convert to fraction form
   1,980.74/2,732.23 = 1,308.55/x
3. Step 3: Cross multiply
   1,980.74x = 2,732.23 × 1,308.55
4. Step 4: Simplify right side
   1,980.74x = 3,575,259.57
5. Step 5: Solve for x
   x = 3,575,259.57/1,980.74
6. Step 6: Final answer
   x = 1,805.01