Finding the Fourth Proportional to 1,980.69, 2,967.80 and 1,055.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.69 : 2,967.80 = 1,055.27 : x
2. Step 2: Convert to fraction form
   1,980.69/2,967.80 = 1,055.27/x
3. Step 3: Cross multiply
   1,980.69x = 2,967.80 × 1,055.27
4. Step 4: Simplify right side
   1,980.69x = 3,131,810.19
5. Step 5: Solve for x
   x = 3,131,810.19/1,980.69
6. Step 6: Final answer
   x = 1,581.17