Finding the Fourth Proportional to 1,446.71, 1,996.45 and 783.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.71 : 1,996.45 = 783.56 : x
2. Step 2: Convert to fraction form
   1,446.71/1,996.45 = 783.56/x
3. Step 3: Cross multiply
   1,446.71x = 1,996.45 × 783.56
4. Step 4: Simplify right side
   1,446.71x = 1,564,341.39
5. Step 5: Solve for x
   x = 1,564,341.39/1,446.71
6. Step 6: Final answer
   x = 1,081.31