Finding the Fourth Proportional to 123,419.10, 170,314.92 and 73,118.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,419.10 : 170,314.92 = 73,118.10 : x
2. Step 2: Convert to fraction form
   123,419.10/170,314.92 = 73,118.10/x
3. Step 3: Cross multiply
   123,419.10x = 170,314.92 × 73,118.10
4. Step 4: Simplify right side
   123,419.10x = 12,453,103,352.05
5. Step 5: Solve for x
   x = 12,453,103,352.05/123,419.10
6. Step 6: Final answer
   x = 100,900.94