Finding the Fourth Proportional to 1,338.73, 2,007.45 and 783.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.73 : 2,007.45 = 783.59 : x
2. Step 2: Convert to fraction form
   1,338.73/2,007.45 = 783.59/x
3. Step 3: Cross multiply
   1,338.73x = 2,007.45 × 783.59
4. Step 4: Simplify right side
   1,338.73x = 1,573,007.71
5. Step 5: Solve for x
   x = 1,573,007.71/1,338.73
6. Step 6: Final answer
   x = 1,175.00