Finding the Fourth Proportional to 105,870.80, 146,101.10 and 57,473.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,870.80 : 146,101.10 = 57,473.71 : x
2. Step 2: Convert to fraction form
   105,870.80/146,101.10 = 57,473.71/x
3. Step 3: Cross multiply
   105,870.80x = 146,101.10 × 57,473.71
4. Step 4: Simplify right side
   105,870.80x = 8,396,971,599.46
5. Step 5: Solve for x
   x = 8,396,971,599.46/105,870.80
6. Step 6: Final answer
   x = 79,313.38