Finding the Fourth Proportional to 105,628.50, 145,767.42 and 57,882.06

Step by Step Solution

1. Step 1: Write the proportion equation
   105,628.50 : 145,767.42 = 57,882.06 : x
2. Step 2: Convert to fraction form
   105,628.50/145,767.42 = 57,882.06/x
3. Step 3: Cross multiply
   105,628.50x = 145,767.42 × 57,882.06
4. Step 4: Simplify right side
   105,628.50x = 8,437,318,550.49
5. Step 5: Solve for x
   x = 8,437,318,550.49/105,628.50
6. Step 6: Final answer
   x = 79,877.29