Finding the Fourth Proportional to 105,002.79, 144,904.44 and 57,256.93

Step by Step Solution

1. Step 1: Write the proportion equation
   105,002.79 : 144,904.44 = 57,256.93 : x
2. Step 2: Convert to fraction form
   105,002.79/144,904.44 = 57,256.93/x
3. Step 3: Cross multiply
   105,002.79x = 144,904.44 × 57,256.93
4. Step 4: Simplify right side
   105,002.79x = 8,296,783,377.77
5. Step 5: Solve for x
   x = 8,296,783,377.77/105,002.79
6. Step 6: Final answer
   x = 79,014.89