Finding the Fourth Proportional to 105,704.27, 145,870.83 and 57,957.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,704.27 : 145,870.83 = 57,957.50 : x
2. Step 2: Convert to fraction form
   105,704.27/145,870.83 = 57,957.50/x
3. Step 3: Cross multiply
   105,704.27x = 145,870.83 × 57,957.50
4. Step 4: Simplify right side
   105,704.27x = 8,454,308,994.40
5. Step 5: Solve for x
   x = 8,454,308,994.40/105,704.27
6. Step 6: Final answer
   x = 79,980.77