Finding the Fourth Proportional to 1,991.98, 2,743.23 and 1,985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.98 : 2,743.23 = 1,985.50 : x
2. Step 2: Convert to fraction form
   1,991.98/2,743.23 = 1,985.50/x
3. Step 3: Cross multiply
   1,991.98x = 2,743.23 × 1,985.50
4. Step 4: Simplify right side
   1,991.98x = 5,446,683.17
5. Step 5: Solve for x
   x = 5,446,683.17/1,991.98
6. Step 6: Final answer
   x = 2,734.31