Finding the Fourth Proportional to 105,111.90, 145,053.27 and 57,364.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105,111.90 : 145,053.27 = 57,364.83 : x
2. Step 2: Convert to fraction form
   105,111.90/145,053.27 = 57,364.83/x
3. Step 3: Cross multiply
   105,111.90x = 145,053.27 × 57,364.83
4. Step 4: Simplify right side
   105,111.90x = 8,320,956,174.49
5. Step 5: Solve for x
   x = 8,320,956,174.49/105,111.90
6. Step 6: Final answer
   x = 79,162.84