Finding the Fourth Proportional to 1,990.72, 3,002.01 and 1,963.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990.72 : 3,002.01 = 1,963.36 : x
2. Step 2: Convert to fraction form
   1,990.72/3,002.01 = 1,963.36/x
3. Step 3: Cross multiply
   1,990.72x = 3,002.01 × 1,963.36
4. Step 4: Simplify right side
   1,990.72x = 5,894,026.35
5. Step 5: Solve for x
   x = 5,894,026.35/1,990.72
6. Step 6: Final answer
   x = 2,960.75