Finding the Fourth Proportional to 1,384.73, 1,911.87 and 1,069.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.73 : 1,911.87 = 1,069.47 : x
2. Step 2: Convert to fraction form
   1,384.73/1,911.87 = 1,069.47/x
3. Step 3: Cross multiply
   1,384.73x = 1,911.87 × 1,069.47
4. Step 4: Simplify right side
   1,384.73x = 2,044,687.61
5. Step 5: Solve for x
   x = 2,044,687.61/1,384.73
6. Step 6: Final answer
   x = 1,476.60