Finding the Fourth Proportional to 105,003.72, 144,902.52 and 57,258

Step by Step Solution

1. Step 1: Write the proportion equation
   105,003.72 : 144,902.52 = 57,258 : x
2. Step 2: Convert to fraction form
   105,003.72/144,902.52 = 57,258/x
3. Step 3: Cross multiply
   105,003.72x = 144,902.52 × 57,258
4. Step 4: Simplify right side
   105,003.72x = 8,296,828,490.16
5. Step 5: Solve for x
   x = 8,296,828,490.16/105,003.72
6. Step 6: Final answer
   x = 79,014.61