Finding the Fourth Proportional to 186,978.62, 280,590.78 and 68,651.12

Step by Step Solution

1. Step 1: Write the proportion equation
   186,978.62 : 280,590.78 = 68,651.12 : x
2. Step 2: Convert to fraction form
   186,978.62/280,590.78 = 68,651.12/x
3. Step 3: Cross multiply
   186,978.62x = 280,590.78 × 68,651.12
4. Step 4: Simplify right side
   186,978.62x = 19,262,871,308.67
5. Step 5: Solve for x
   x = 19,262,871,308.67/186,978.62
6. Step 6: Final answer
   x = 103,021.79