Finding the Fourth Proportional to 2,900.94, 4,327.05 and 2,638.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,900.94 : 4,327.05 = 2,638.50 : x
2. Step 2: Convert to fraction form
   2,900.94/4,327.05 = 2,638.50/x
3. Step 3: Cross multiply
   2,900.94x = 4,327.05 × 2,638.50
4. Step 4: Simplify right side
   2,900.94x = 11,416,921.43
5. Step 5: Solve for x
   x = 11,416,921.43/2,900.94
6. Step 6: Final answer
   x = 3,935.59