Finding the Fourth Proportional to 51,018.14, 70,404.72 and 28,356.78

Step by Step Solution

1. Step 1: Write the proportion equation
   51,018.14 : 70,404.72 = 28,356.78 : x
2. Step 2: Convert to fraction form
   51,018.14/70,404.72 = 28,356.78/x
3. Step 3: Cross multiply
   51,018.14x = 70,404.72 × 28,356.78
4. Step 4: Simplify right side
   51,018.14x = 1,996,451,156.00
5. Step 5: Solve for x
   x = 1,996,451,156.00/51,018.14
6. Step 6: Final answer
   x = 39,132.18