Finding the Fourth Proportional to 89,882.76, 134,940.78 and 69,120.84

Step by Step Solution

1. Step 1: Write the proportion equation
   89,882.76 : 134,940.78 = 69,120.84 : x
2. Step 2: Convert to fraction form
   89,882.76/134,940.78 = 69,120.84/x
3. Step 3: Cross multiply
   89,882.76x = 134,940.78 × 69,120.84
4. Step 4: Simplify right side
   89,882.76x = 9,327,220,063.86
5. Step 5: Solve for x
   x = 9,327,220,063.86/89,882.76
6. Step 6: Final answer
   x = 103,770.96