Finding the Fourth Proportional to 51,399.34, 77,052.18 and 19,789.18

Step by Step Solution

1. Step 1: Write the proportion equation
   51,399.34 : 77,052.18 = 19,789.18 : x
2. Step 2: Convert to fraction form
   51,399.34/77,052.18 = 19,789.18/x
3. Step 3: Cross multiply
   51,399.34x = 77,052.18 × 19,789.18
4. Step 4: Simplify right side
   51,399.34x = 1,524,799,459.41
5. Step 5: Solve for x
   x = 1,524,799,459.41/51,399.34
6. Step 6: Final answer
   x = 29,665.74