Finding the Fourth Proportional to 141,731, 195,588.78 and 78,068.60

Step by Step Solution

1. Step 1: Write the proportion equation
   141,731 : 195,588.78 = 78,068.60 : x
2. Step 2: Convert to fraction form
   141,731/195,588.78 = 78,068.60/x
3. Step 3: Cross multiply
   141,731x = 195,588.78 × 78,068.60
4. Step 4: Simplify right side
   141,731x = 15,269,342,230.31
5. Step 5: Solve for x
   x = 15,269,342,230.31/141,731
6. Step 6: Final answer
   x = 107,734.67