Finding the Fourth Proportional to 105,561.82, 145,667.73 and 57,807.46

Step by Step Solution

1. Step 1: Write the proportion equation
   105,561.82 : 145,667.73 = 57,807.46 : x
2. Step 2: Convert to fraction form
   105,561.82/145,667.73 = 57,807.46/x
3. Step 3: Cross multiply
   105,561.82x = 145,667.73 × 57,807.46
4. Step 4: Simplify right side
   105,561.82x = 8,420,681,475.27
5. Step 5: Solve for x
   x = 8,420,681,475.27/105,561.82
6. Step 6: Final answer
   x = 79,770.14