Finding the Fourth Proportional to 51,018.41, 70,401.99 and 28,355.93

Step by Step Solution

1. Step 1: Write the proportion equation
   51,018.41 : 70,401.99 = 28,355.93 : x
2. Step 2: Convert to fraction form
   51,018.41/70,401.99 = 28,355.93/x
3. Step 3: Cross multiply
   51,018.41x = 70,401.99 × 28,355.93
4. Step 4: Simplify right side
   51,018.41x = 1,996,313,900.30
5. Step 5: Solve for x
   x = 1,996,313,900.30/51,018.41
6. Step 6: Final answer
   x = 39,129.28