Finding the Fourth Proportional to 105,635.25, 145,776.69 and 57,890.52

Step by Step Solution

1. Step 1: Write the proportion equation
   105,635.25 : 145,776.69 = 57,890.52 : x
2. Step 2: Convert to fraction form
   105,635.25/145,776.69 = 57,890.52/x
3. Step 3: Cross multiply
   105,635.25x = 145,776.69 × 57,890.52
4. Step 4: Simplify right side
   105,635.25x = 8,439,088,387.98
5. Step 5: Solve for x
   x = 8,439,088,387.98/105,635.25
6. Step 6: Final answer
   x = 79,888.94