Finding the Fourth Proportional to 105,018.83, 144,924.44 and 57,272.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,018.83 : 144,924.44 = 57,272.06 : x
2. Step 2: Convert to fraction form
   105,018.83/144,924.44 = 57,272.06/x
3. Step 3: Cross multiply
   105,018.83x = 144,924.44 × 57,272.06
4. Step 4: Simplify right side
   105,018.83x = 8,300,121,621.25
5. Step 5: Solve for x
   x = 8,300,121,621.25/105,018.83
6. Step 6: Final answer
   x = 79,034.60