Finding the Fourth Proportional to 2,870.38, 3,960.48 and 1,691.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.38 : 3,960.48 = 1,691.56 : x
2. Step 2: Convert to fraction form
   2,870.38/3,960.48 = 1,691.56/x
3. Step 3: Cross multiply
   2,870.38x = 3,960.48 × 1,691.56
4. Step 4: Simplify right side
   2,870.38x = 6,699,389.55
5. Step 5: Solve for x
   x = 6,699,389.55/2,870.38
6. Step 6: Final answer
   x = 2,333.97