Finding the Fourth Proportional to 123,894.72, 170,985.12 and 70,196.80

Step by Step Solution

1. Step 1: Write the proportion equation
   123,894.72 : 170,985.12 = 70,196.80 : x
2. Step 2: Convert to fraction form
   123,894.72/170,985.12 = 70,196.80/x
3. Step 3: Cross multiply
   123,894.72x = 170,985.12 × 70,196.80
4. Step 4: Simplify right side
   123,894.72x = 12,002,608,271.62
5. Step 5: Solve for x
   x = 12,002,608,271.62/123,894.72
6. Step 6: Final answer
   x = 96,877.48