Finding the Fourth Proportional to 123,667.48, 170,685.42 and 72,696.70

Step by Step Solution

1. Step 1: Write the proportion equation
   123,667.48 : 170,685.42 = 72,696.70 : x
2. Step 2: Convert to fraction form
   123,667.48/170,685.42 = 72,696.70/x
3. Step 3: Cross multiply
   123,667.48x = 170,685.42 × 72,696.70
4. Step 4: Simplify right side
   123,667.48x = 12,408,266,772.11
5. Step 5: Solve for x
   x = 12,408,266,772.11/123,667.48
6. Step 6: Final answer
   x = 100,335.73