Finding the Fourth Proportional to 2,016.33, 2,784.65 and 1,388.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.33 : 2,784.65 = 1,388.47 : x
2. Step 2: Convert to fraction form
   2,016.33/2,784.65 = 1,388.47/x
3. Step 3: Cross multiply
   2,016.33x = 2,784.65 × 1,388.47
4. Step 4: Simplify right side
   2,016.33x = 3,866,402.99
5. Step 5: Solve for x
   x = 3,866,402.99/2,016.33
6. Step 6: Final answer
   x = 1,917.54