Finding the Fourth Proportional to 141,805.69, 195,693.15 and 78,145.77

Step by Step Solution

1. Step 1: Write the proportion equation
   141,805.69 : 195,693.15 = 78,145.77 : x
2. Step 2: Convert to fraction form
   141,805.69/195,693.15 = 78,145.77/x
3. Step 3: Cross multiply
   141,805.69x = 195,693.15 × 78,145.77
4. Step 4: Simplify right side
   141,805.69x = 15,292,591,499.75
5. Step 5: Solve for x
   x = 15,292,591,499.75/141,805.69
6. Step 6: Final answer
   x = 107,841.88