Finding the Fourth Proportional to 86,288.69, 129,470.73 and 30,169.10

Step by Step Solution

1. Step 1: Write the proportion equation
   86,288.69 : 129,470.73 = 30,169.10 : x
2. Step 2: Convert to fraction form
   86,288.69/129,470.73 = 30,169.10/x
3. Step 3: Cross multiply
   86,288.69x = 129,470.73 × 30,169.10
4. Step 4: Simplify right side
   86,288.69x = 3,906,014,753.09
5. Step 5: Solve for x
   x = 3,906,014,753.09/86,288.69
6. Step 6: Final answer
   x = 45,266.82