Finding the Fourth Proportional to 2,958.42, 4,430.05 and 2,870.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,958.42 : 4,430.05 = 2,870.83 : x
2. Step 2: Convert to fraction form
   2,958.42/4,430.05 = 2,870.83/x
3. Step 3: Cross multiply
   2,958.42x = 4,430.05 × 2,870.83
4. Step 4: Simplify right side
   2,958.42x = 12,717,883.94
5. Step 5: Solve for x
   x = 12,717,883.94/2,958.42
6. Step 6: Final answer
   x = 4,298.88