Finding the Fourth Proportional to 1,989.96, 2,986.50 and 1,377.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,989.96 : 2,986.50 = 1,377.96 : x
2. Step 2: Convert to fraction form
   1,989.96/2,986.50 = 1,377.96/x
3. Step 3: Cross multiply
   1,989.96x = 2,986.50 × 1,377.96
4. Step 4: Simplify right side
   1,989.96x = 4,115,255.72
5. Step 5: Solve for x
   x = 4,115,255.72/1,989.96
6. Step 6: Final answer
   x = 2,068.01