Finding the Fourth Proportional to 8,870.99, 13,309.34 and 2,631.05

Step by Step Solution

1. Step 1: Write the proportion equation
   8,870.99 : 13,309.34 = 2,631.05 : x
2. Step 2: Convert to fraction form
   8,870.99/13,309.34 = 2,631.05/x
3. Step 3: Cross multiply
   8,870.99x = 13,309.34 × 2,631.05
4. Step 4: Simplify right side
   8,870.99x = 35,017,525.85
5. Step 5: Solve for x
   x = 35,017,525.85/8,870.99
6. Step 6: Final answer
   x = 3,947.42