Finding the Fourth Proportional to 1,978.81, 2,743.24 and 1,873.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.81 : 2,743.24 = 1,873.47 : x
2. Step 2: Convert to fraction form
   1,978.81/2,743.24 = 1,873.47/x
3. Step 3: Cross multiply
   1,978.81x = 2,743.24 × 1,873.47
4. Step 4: Simplify right side
   1,978.81x = 5,139,390.47
5. Step 5: Solve for x
   x = 5,139,390.47/1,978.81
6. Step 6: Final answer
   x = 2,597.22