Finding the Fourth Proportional to 105,116.10, 145,060.62 and 57,370.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,116.10 : 145,060.62 = 57,370.50 : x
2. Step 2: Convert to fraction form
   105,116.10/145,060.62 = 57,370.50/x
3. Step 3: Cross multiply
   105,116.10x = 145,060.62 × 57,370.50
4. Step 4: Simplify right side
   105,116.10x = 8,322,200,299.71
5. Step 5: Solve for x
   x = 8,322,200,299.71/105,116.10
6. Step 6: Final answer
   x = 79,171.51