Finding the Fourth Proportional to 123,605.01, 170,576.24 and 72,619.88

Step by Step Solution

1. Step 1: Write the proportion equation
   123,605.01 : 170,576.24 = 72,619.88 : x
2. Step 2: Convert to fraction form
   123,605.01/170,576.24 = 72,619.88/x
3. Step 3: Cross multiply
   123,605.01x = 170,576.24 × 72,619.88
4. Step 4: Simplify right side
   123,605.01x = 12,387,224,863.67
5. Step 5: Solve for x
   x = 12,387,224,863.67/123,605.01
6. Step 6: Final answer
   x = 100,216.20