Finding the Fourth Proportional to 105,279.22, 145,287.42 and 57,535.54

Step by Step Solution

1. Step 1: Write the proportion equation
   105,279.22 : 145,287.42 = 57,535.54 : x
2. Step 2: Convert to fraction form
   105,279.22/145,287.42 = 57,535.54/x
3. Step 3: Cross multiply
   105,279.22x = 145,287.42 × 57,535.54
4. Step 4: Simplify right side
   105,279.22x = 8,359,190,164.91
5. Step 5: Solve for x
   x = 8,359,190,164.91/105,279.22
6. Step 6: Final answer
   x = 79,400.19