Finding the Fourth Proportional to 89,419.49, 134,448.86 and 82,485.34

Step by Step Solution

1. Step 1: Write the proportion equation
   89,419.49 : 134,448.86 = 82,485.34 : x
2. Step 2: Convert to fraction form
   89,419.49/134,448.86 = 82,485.34/x
3. Step 3: Cross multiply
   89,419.49x = 134,448.86 × 82,485.34
4. Step 4: Simplify right side
   89,419.49x = 11,090,059,799.80
5. Step 5: Solve for x
   x = 11,090,059,799.80/89,419.49
6. Step 6: Final answer
   x = 124,022.84