Finding the Fourth Proportional to 93,414.57, 128,878.41 and 71,910.89

Step by Step Solution

1. Step 1: Write the proportion equation
   93,414.57 : 128,878.41 = 71,910.89 : x
2. Step 2: Convert to fraction form
   93,414.57/128,878.41 = 71,910.89/x
3. Step 3: Cross multiply
   93,414.57x = 128,878.41 × 71,910.89
4. Step 4: Simplify right side
   93,414.57x = 9,267,761,164.88
5. Step 5: Solve for x
   x = 9,267,761,164.88/93,414.57
6. Step 6: Final answer
   x = 99,211.09