Finding the Fourth Proportional to 3,784.63, 5,670.67 and 1,318.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,784.63 : 5,670.67 = 1,318.12 : x
2. Step 2: Convert to fraction form
   3,784.63/5,670.67 = 1,318.12/x
3. Step 3: Cross multiply
   3,784.63x = 5,670.67 × 1,318.12
4. Step 4: Simplify right side
   3,784.63x = 7,474,623.54
5. Step 5: Solve for x
   x = 7,474,623.54/3,784.63
6. Step 6: Final answer
   x = 1,974.99