Finding the Fourth Proportional to 123,628.78, 170,607.72 and 67,040.16

Step by Step Solution

1. Step 1: Write the proportion equation
   123,628.78 : 170,607.72 = 67,040.16 : x
2. Step 2: Convert to fraction form
   123,628.78/170,607.72 = 67,040.16/x
3. Step 3: Cross multiply
   123,628.78x = 170,607.72 × 67,040.16
4. Step 4: Simplify right side
   123,628.78x = 11,437,568,080.56
5. Step 5: Solve for x
   x = 11,437,568,080.56/123,628.78
6. Step 6: Final answer
   x = 92,515.42