Finding the Fourth Proportional to 116,858.34, 161,297.59 and 69,128.28

Step by Step Solution

1. Step 1: Write the proportion equation
   116,858.34 : 161,297.59 = 69,128.28 : x
2. Step 2: Convert to fraction form
   116,858.34/161,297.59 = 69,128.28/x
3. Step 3: Cross multiply
   116,858.34x = 161,297.59 × 69,128.28
4. Step 4: Simplify right side
   116,858.34x = 11,150,224,964.85
5. Step 5: Solve for x
   x = 11,150,224,964.85/116,858.34
6. Step 6: Final answer
   x = 95,416.60