Finding the Fourth Proportional to 131,419.59, 197,145.78 and 51,447.23

Step by Step Solution

1. Step 1: Write the proportion equation
   131,419.59 : 197,145.78 = 51,447.23 : x
2. Step 2: Convert to fraction form
   131,419.59/197,145.78 = 51,447.23/x
3. Step 3: Cross multiply
   131,419.59x = 197,145.78 × 51,447.23
4. Step 4: Simplify right side
   131,419.59x = 10,142,603,301.46
5. Step 5: Solve for x
   x = 10,142,603,301.46/131,419.59
6. Step 6: Final answer
   x = 77,177.26