Finding the Fourth Proportional to 105,004.47, 144,903 and 57,258.75

Step by Step Solution

1. Step 1: Write the proportion equation
   105,004.47 : 144,903 = 57,258.75 : x
2. Step 2: Convert to fraction form
   105,004.47/144,903 = 57,258.75/x
3. Step 3: Cross multiply
   105,004.47x = 144,903 × 57,258.75
4. Step 4: Simplify right side
   105,004.47x = 8,296,964,651.25
5. Step 5: Solve for x
   x = 8,296,964,651.25/105,004.47
6. Step 6: Final answer
   x = 79,015.35