Finding the Fourth Proportional to 1,983.50, 2,973.87 and 872.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.50 : 2,973.87 = 872.38 : x
2. Step 2: Convert to fraction form
   1,983.50/2,973.87 = 872.38/x
3. Step 3: Cross multiply
   1,983.50x = 2,973.87 × 872.38
4. Step 4: Simplify right side
   1,983.50x = 2,594,337.28
5. Step 5: Solve for x
   x = 2,594,337.28/1,983.50
6. Step 6: Final answer
   x = 1,307.96