Finding the Fourth Proportional to 1,983.72, 2,977.98 and 1,905.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.72 : 2,977.98 = 1,905.42 : x
2. Step 2: Convert to fraction form
   1,983.72/2,977.98 = 1,905.42/x
3. Step 3: Cross multiply
   1,983.72x = 2,977.98 × 1,905.42
4. Step 4: Simplify right side
   1,983.72x = 5,674,302.65
5. Step 5: Solve for x
   x = 5,674,302.65/1,983.72
6. Step 6: Final answer
   x = 2,860.44