Finding the Fourth Proportional to 72,567.36, 108,849.92 and 51,131.45

Step by Step Solution

1. Step 1: Write the proportion equation
   72,567.36 : 108,849.92 = 51,131.45 : x
2. Step 2: Convert to fraction form
   72,567.36/108,849.92 = 51,131.45/x
3. Step 3: Cross multiply
   72,567.36x = 108,849.92 × 51,131.45
4. Step 4: Simplify right side
   72,567.36x = 5,565,654,258.45
5. Step 5: Solve for x
   x = 5,565,654,258.45/72,567.36
6. Step 6: Final answer
   x = 76,696.39