Finding the Fourth Proportional to 105,519.69, 145,617.15 and 57,773.02

Step by Step Solution

1. Step 1: Write the proportion equation
   105,519.69 : 145,617.15 = 57,773.02 : x
2. Step 2: Convert to fraction form
   105,519.69/145,617.15 = 57,773.02/x
3. Step 3: Cross multiply
   105,519.69x = 145,617.15 × 57,773.02
4. Step 4: Simplify right side
   105,519.69x = 8,412,742,519.29
5. Step 5: Solve for x
   x = 8,412,742,519.29/105,519.69
6. Step 6: Final answer
   x = 79,726.76