Finding the Fourth Proportional to 1,991.77, 2,743.06 and 1,948.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.77 : 2,743.06 = 1,948.72 : x
2. Step 2: Convert to fraction form
   1,991.77/2,743.06 = 1,948.72/x
3. Step 3: Cross multiply
   1,991.77x = 2,743.06 × 1,948.72
4. Step 4: Simplify right side
   1,991.77x = 5,345,455.88
5. Step 5: Solve for x
   x = 5,345,455.88/1,991.77
6. Step 6: Final answer
   x = 2,683.77