Finding the Fourth Proportional to 141,641.69, 195,498.78 and 81,211.25

Step by Step Solution

1. Step 1: Write the proportion equation
   141,641.69 : 195,498.78 = 81,211.25 : x
2. Step 2: Convert to fraction form
   141,641.69/195,498.78 = 81,211.25/x
3. Step 3: Cross multiply
   141,641.69x = 195,498.78 × 81,211.25
4. Step 4: Simplify right side
   141,641.69x = 15,876,700,297.28
5. Step 5: Solve for x
   x = 15,876,700,297.28/141,641.69
6. Step 6: Final answer
   x = 112,090.59