Finding the Fourth Proportional to 123,885.94, 170,996.37 and 72,915.03

Step by Step Solution

1. Step 1: Write the proportion equation
   123,885.94 : 170,996.37 = 72,915.03 : x
2. Step 2: Convert to fraction form
   123,885.94/170,996.37 = 72,915.03/x
3. Step 3: Cross multiply
   123,885.94x = 170,996.37 × 72,915.03
4. Step 4: Simplify right side
   123,885.94x = 12,468,205,448.44
5. Step 5: Solve for x
   x = 12,468,205,448.44/123,885.94
6. Step 6: Final answer
   x = 100,642.62