Finding the Fourth Proportional to 2,958.55, 4,430.23 and 2,870.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,958.55 : 4,430.23 = 2,870.96 : x
2. Step 2: Convert to fraction form
   2,958.55/4,430.23 = 2,870.96/x
3. Step 3: Cross multiply
   2,958.55x = 4,430.23 × 2,870.96
4. Step 4: Simplify right side
   2,958.55x = 12,718,976.61
5. Step 5: Solve for x
   x = 12,718,976.61/2,958.55
6. Step 6: Final answer
   x = 4,299.06