Finding the Fourth Proportional to 51,419.61, 70,958.73 and 28,758.49

Step by Step Solution

1. Step 1: Write the proportion equation
   51,419.61 : 70,958.73 = 28,758.49 : x
2. Step 2: Convert to fraction form
   51,419.61/70,958.73 = 28,758.49/x
3. Step 3: Cross multiply
   51,419.61x = 70,958.73 × 28,758.49
4. Step 4: Simplify right side
   51,419.61x = 2,040,666,256.71
5. Step 5: Solve for x
   x = 2,040,666,256.71/51,419.61
6. Step 6: Final answer
   x = 39,686.54