Finding the Fourth Proportional to 3,781.08, 5,671.59 and 1,315.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,781.08 : 5,671.59 = 1,315.89 : x
2. Step 2: Convert to fraction form
   3,781.08/5,671.59 = 1,315.89/x
3. Step 3: Cross multiply
   3,781.08x = 5,671.59 × 1,315.89
4. Step 4: Simplify right side
   3,781.08x = 7,463,188.57
5. Step 5: Solve for x
   x = 7,463,188.57/3,781.08
6. Step 6: Final answer
   x = 1,973.82