Finding the Fourth Proportional to 1,980.86, 2,731.52 and 1,383.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,980.86 : 2,731.52 = 1,383.89 : x
2. Step 2: Convert to fraction form
   1,980.86/2,731.52 = 1,383.89/x
3. Step 3: Cross multiply
   1,980.86x = 2,731.52 × 1,383.89
4. Step 4: Simplify right side
   1,980.86x = 3,780,113.01
5. Step 5: Solve for x
   x = 3,780,113.01/1,980.86
6. Step 6: Final answer
   x = 1,908.32