Finding the Fourth Proportional to 3,654.42, 5,480.25 and 1,313.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,654.42 : 5,480.25 = 1,313.79 : x
2. Step 2: Convert to fraction form
   3,654.42/5,480.25 = 1,313.79/x
3. Step 3: Cross multiply
   3,654.42x = 5,480.25 × 1,313.79
4. Step 4: Simplify right side
   3,654.42x = 7,199,870.25
5. Step 5: Solve for x
   x = 7,199,870.25/3,654.42
6. Step 6: Final answer
   x = 1,970.18