Finding the Fourth Proportional to 1,978.85, 2,969.04 and 1,817.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.85 : 2,969.04 = 1,817.39 : x
2. Step 2: Convert to fraction form
   1,978.85/2,969.04 = 1,817.39/x
3. Step 3: Cross multiply
   1,978.85x = 2,969.04 × 1,817.39
4. Step 4: Simplify right side
   1,978.85x = 5,395,888.76
5. Step 5: Solve for x
   x = 5,395,888.76/1,978.85
6. Step 6: Final answer
   x = 2,726.79