Finding the Fourth Proportional to 123,796.22, 170,839.50 and 72,811.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,796.22 : 170,839.50 = 72,811.10 : x
2. Step 2: Convert to fraction form
   123,796.22/170,839.50 = 72,811.10/x
3. Step 3: Cross multiply
   123,796.22x = 170,839.50 × 72,811.10
4. Step 4: Simplify right side
   123,796.22x = 12,439,010,700.20
5. Step 5: Solve for x
   x = 12,439,010,700.20/123,796.22
6. Step 6: Final answer
   x = 100,479.73