Finding the Fourth Proportional to 7,361.76, 10,159.50 and 4,218.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,361.76 : 10,159.50 = 4,218.55 : x
2. Step 2: Convert to fraction form
   7,361.76/10,159.50 = 4,218.55/x
3. Step 3: Cross multiply
   7,361.76x = 10,159.50 × 4,218.55
4. Step 4: Simplify right side
   7,361.76x = 42,858,368.30
5. Step 5: Solve for x
   x = 42,858,368.30/7,361.76
6. Step 6: Final answer
   x = 5,821.76