Finding the Fourth Proportional to 1,974.69, 2,721.60 and 1,384.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,974.69 : 2,721.60 = 1,384.20 : x
2. Step 2: Convert to fraction form
   1,974.69/2,721.60 = 1,384.20/x
3. Step 3: Cross multiply
   1,974.69x = 2,721.60 × 1,384.20
4. Step 4: Simplify right side
   1,974.69x = 3,767,238.72
5. Step 5: Solve for x
   x = 3,767,238.72/1,974.69
6. Step 6: Final answer
   x = 1,907.76