Finding the Fourth Proportional to 123,412.23, 170,327.05 and 72,453.07

Step by Step Solution

1. Step 1: Write the proportion equation
   123,412.23 : 170,327.05 = 72,453.07 : x
2. Step 2: Convert to fraction form
   123,412.23/170,327.05 = 72,453.07/x
3. Step 3: Cross multiply
   123,412.23x = 170,327.05 × 72,453.07
4. Step 4: Simplify right side
   123,412.23x = 12,340,717,157.78
5. Step 5: Solve for x
   x = 12,340,717,157.78/123,412.23
6. Step 6: Final answer
   x = 99,995.90