Finding the Fourth Proportional to 3,785.63, 5,672.17 and 1,319.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,785.63 : 5,672.17 = 1,319.12 : x
2. Step 2: Convert to fraction form
   3,785.63/5,672.17 = 1,319.12/x
3. Step 3: Cross multiply
   3,785.63x = 5,672.17 × 1,319.12
4. Step 4: Simplify right side
   3,785.63x = 7,482,272.89
5. Step 5: Solve for x
   x = 7,482,272.89/3,785.63
6. Step 6: Final answer
   x = 1,976.49