Finding the Fourth Proportional to 105,081.36, 145,006.20 and 59,770.32

Step by Step Solution

1. Step 1: Write the proportion equation
   105,081.36 : 145,006.20 = 59,770.32 : x
2. Step 2: Convert to fraction form
   105,081.36/145,006.20 = 59,770.32/x
3. Step 3: Cross multiply
   105,081.36x = 145,006.20 × 59,770.32
4. Step 4: Simplify right side
   105,081.36x = 8,667,066,975.98
5. Step 5: Solve for x
   x = 8,667,066,975.98/105,081.36
6. Step 6: Final answer
   x = 82,479.59