Finding the Fourth Proportional to 3,621.32, 4,997.32 and 2,128.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,621.32 : 4,997.32 = 2,128.89 : x
2. Step 2: Convert to fraction form
   3,621.32/4,997.32 = 2,128.89/x
3. Step 3: Cross multiply
   3,621.32x = 4,997.32 × 2,128.89
4. Step 4: Simplify right side
   3,621.32x = 10,638,744.57
5. Step 5: Solve for x
   x = 10,638,744.57/3,621.32
6. Step 6: Final answer
   x = 2,937.81