Finding the Fourth Proportional to 3,780.83, 5,669.42 and 1,315.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.83 : 5,669.42 = 1,315.59 : x
2. Step 2: Convert to fraction form
   3,780.83/5,669.42 = 1,315.59/x
3. Step 3: Cross multiply
   3,780.83x = 5,669.42 × 1,315.59
4. Step 4: Simplify right side
   3,780.83x = 7,458,625.68
5. Step 5: Solve for x
   x = 7,458,625.68/3,780.83
6. Step 6: Final answer
   x = 1,972.75