Finding the Fourth Proportional to 128,016.01, 176,662.10 and 71,427.38

Step by Step Solution

1. Step 1: Write the proportion equation
   128,016.01 : 176,662.10 = 71,427.38 : x
2. Step 2: Convert to fraction form
   128,016.01/176,662.10 = 71,427.38/x
3. Step 3: Cross multiply
   128,016.01x = 176,662.10 × 71,427.38
4. Step 4: Simplify right side
   128,016.01x = 12,618,510,591.16
5. Step 5: Solve for x
   x = 12,618,510,591.16/128,016.01
6. Step 6: Final answer
   x = 98,569.79