Finding the Fourth Proportional to 253,642.56, 380,469.98 and 85,168.38

Step by Step Solution

1. Step 1: Write the proportion equation
   253,642.56 : 380,469.98 = 85,168.38 : x
2. Step 2: Convert to fraction form
   253,642.56/380,469.98 = 85,168.38/x
3. Step 3: Cross multiply
   253,642.56x = 380,469.98 × 85,168.38
4. Step 4: Simplify right side
   253,642.56x = 32,404,011,835.23
5. Step 5: Solve for x
   x = 32,404,011,835.23/253,642.56
6. Step 6: Final answer
   x = 127,754.63