Finding the Fourth Proportional to 3,780.31, 5,671.38 and 1,314.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,780.31 : 5,671.38 = 1,314.78 : x
2. Step 2: Convert to fraction form
   3,780.31/5,671.38 = 1,314.78/x
3. Step 3: Cross multiply
   3,780.31x = 5,671.38 × 1,314.78
4. Step 4: Simplify right side
   3,780.31x = 7,456,617.00
5. Step 5: Solve for x
   x = 7,456,617.00/3,780.31
6. Step 6: Final answer
   x = 1,972.49