Finding the Fourth Proportional to 51,443.76, 77,189.64 and 18,189

Step by Step Solution

1. Step 1: Write the proportion equation
   51,443.76 : 77,189.64 = 18,189 : x
2. Step 2: Convert to fraction form
   51,443.76/77,189.64 = 18,189/x
3. Step 3: Cross multiply
   51,443.76x = 77,189.64 × 18,189
4. Step 4: Simplify right side
   51,443.76x = 1,404,002,361.96
5. Step 5: Solve for x
   x = 1,404,002,361.96/51,443.76
6. Step 6: Final answer
   x = 27,291.99