Finding the Fourth Proportional to 105,618.60, 145,757.06 and 57,875

Step by Step Solution

1. Step 1: Write the proportion equation
   105,618.60 : 145,757.06 = 57,875 : x
2. Step 2: Convert to fraction form
   105,618.60/145,757.06 = 57,875/x
3. Step 3: Cross multiply
   105,618.60x = 145,757.06 × 57,875
4. Step 4: Simplify right side
   105,618.60x = 8,435,689,847.50
5. Step 5: Solve for x
   x = 8,435,689,847.50/105,618.60
6. Step 6: Final answer
   x = 79,869.36