Finding the Fourth Proportional to 1,384.90, 2,069.25 and 1,336.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.90 : 2,069.25 = 1,336.47 : x
2. Step 2: Convert to fraction form
   1,384.90/2,069.25 = 1,336.47/x
3. Step 3: Cross multiply
   1,384.90x = 2,069.25 × 1,336.47
4. Step 4: Simplify right side
   1,384.90x = 2,765,490.55
5. Step 5: Solve for x
   x = 2,765,490.55/1,384.90
6. Step 6: Final answer
   x = 1,996.89