Finding the Fourth Proportional to 67,856.69, 101,690.22 and 57,809.09

Step by Step Solution

1. Step 1: Write the proportion equation
   67,856.69 : 101,690.22 = 57,809.09 : x
2. Step 2: Convert to fraction form
   67,856.69/101,690.22 = 57,809.09/x
3. Step 3: Cross multiply
   67,856.69x = 101,690.22 × 57,809.09
4. Step 4: Simplify right side
   67,856.69x = 5,878,619,080.10
5. Step 5: Solve for x
   x = 5,878,619,080.10/67,856.69
6. Step 6: Final answer
   x = 86,632.86