Finding the Fourth Proportional to 123,795.72, 170,878.74 and 72,806.22

Step by Step Solution

1. Step 1: Write the proportion equation
   123,795.72 : 170,878.74 = 72,806.22 : x
2. Step 2: Convert to fraction form
   123,795.72/170,878.74 = 72,806.22/x
3. Step 3: Cross multiply
   123,795.72x = 170,878.74 × 72,806.22
4. Step 4: Simplify right side
   123,795.72x = 12,441,035,137.76
5. Step 5: Solve for x
   x = 12,441,035,137.76/123,795.72
6. Step 6: Final answer
   x = 100,496.49