Finding the Fourth Proportional to 2,628.16, 3,941.78 and 872.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.16 : 3,941.78 = 872.99 : x
2. Step 2: Convert to fraction form
   2,628.16/3,941.78 = 872.99/x
3. Step 3: Cross multiply
   2,628.16x = 3,941.78 × 872.99
4. Step 4: Simplify right side
   2,628.16x = 3,441,152.31
5. Step 5: Solve for x
   x = 3,441,152.31/2,628.16
6. Step 6: Final answer
   x = 1,309.34