Finding the Fourth Proportional to 1,983.31, 2,970.52 and 1,945.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,983.31 : 2,970.52 = 1,945.21 : x
2. Step 2: Convert to fraction form
   1,983.31/2,970.52 = 1,945.21/x
3. Step 3: Cross multiply
   1,983.31x = 2,970.52 × 1,945.21
4. Step 4: Simplify right side
   1,983.31x = 5,778,285.21
5. Step 5: Solve for x
   x = 5,778,285.21/1,983.31
6. Step 6: Final answer
   x = 2,913.46