Finding the Fourth Proportional to 2,627.62, 3,631.34 and 2,154.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.62 : 3,631.34 = 2,154.78 : x
2. Step 2: Convert to fraction form
   2,627.62/3,631.34 = 2,154.78/x
3. Step 3: Cross multiply
   2,627.62x = 3,631.34 × 2,154.78
4. Step 4: Simplify right side
   2,627.62x = 7,824,738.81
5. Step 5: Solve for x
   x = 7,824,738.81/2,627.62
6. Step 6: Final answer
   x = 2,977.88