Finding the Fourth Proportional to 1,978.39, 2,971.99 and 1,873.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,978.39 : 2,971.99 = 1,873.29 : x
2. Step 2: Convert to fraction form
   1,978.39/2,971.99 = 1,873.29/x
3. Step 3: Cross multiply
   1,978.39x = 2,971.99 × 1,873.29
4. Step 4: Simplify right side
   1,978.39x = 5,567,412.63
5. Step 5: Solve for x
   x = 5,567,412.63/1,978.39
6. Step 6: Final answer
   x = 2,814.11