Finding the Fourth Proportional to 281,748.86, 422,647.89 and 71,386.80

Step by Step Solution

1. Step 1: Write the proportion equation
   281,748.86 : 422,647.89 = 71,386.80 : x
2. Step 2: Convert to fraction form
   281,748.86/422,647.89 = 71,386.80/x
3. Step 3: Cross multiply
   281,748.86x = 422,647.89 × 71,386.80
4. Step 4: Simplify right side
   281,748.86x = 30,171,480,393.85
5. Step 5: Solve for x
   x = 30,171,480,393.85/281,748.86
6. Step 6: Final answer
   x = 107,086.43