Finding the Fourth Proportional to 51,019.58, 70,406.56 and 28,357.99

Step by Step Solution

1. Step 1: Write the proportion equation
   51,019.58 : 70,406.56 = 28,357.99 : x
2. Step 2: Convert to fraction form
   51,019.58/70,406.56 = 28,357.99/x
3. Step 3: Cross multiply
   51,019.58x = 70,406.56 × 28,357.99
4. Step 4: Simplify right side
   51,019.58x = 1,996,588,524.41
5. Step 5: Solve for x
   x = 1,996,588,524.41/51,019.58
6. Step 6: Final answer
   x = 39,133.77