Finding the Fourth Proportional to 145,139.32, 217,242.42 and 108,955

Step by Step Solution

1. Step 1: Write the proportion equation
   145,139.32 : 217,242.42 = 108,955 : x
2. Step 2: Convert to fraction form
   145,139.32/217,242.42 = 108,955/x
3. Step 3: Cross multiply
   145,139.32x = 217,242.42 × 108,955
4. Step 4: Simplify right side
   145,139.32x = 23,669,647,871.10
5. Step 5: Solve for x
   x = 23,669,647,871.10/145,139.32
6. Step 6: Final answer
   x = 163,082.26