Finding the Fourth Proportional to 105,903.27, 146,149.11 and 57,507.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,903.27 : 146,149.11 = 57,507.30 : x
2. Step 2: Convert to fraction form
   105,903.27/146,149.11 = 57,507.30/x
3. Step 3: Cross multiply
   105,903.27x = 146,149.11 × 57,507.30
4. Step 4: Simplify right side
   105,903.27x = 8,404,640,713.50
5. Step 5: Solve for x
   x = 8,404,640,713.50/105,903.27
6. Step 6: Final answer
   x = 79,361.48