Finding the Fourth Proportional to 105,653.38, 145,808.52 and 57,906.69

Step by Step Solution

1. Step 1: Write the proportion equation
   105,653.38 : 145,808.52 = 57,906.69 : x
2. Step 2: Convert to fraction form
   105,653.38/145,808.52 = 57,906.69/x
3. Step 3: Cross multiply
   105,653.38x = 145,808.52 × 57,906.69
4. Step 4: Simplify right side
   105,653.38x = 8,443,288,767.00
5. Step 5: Solve for x
   x = 8,443,288,767.00/105,653.38
6. Step 6: Final answer
   x = 79,914.99