Finding the Fourth Proportional to 72,465.75, 99,968.72 and 51,256.71

Step by Step Solution

1. Step 1: Write the proportion equation
   72,465.75 : 99,968.72 = 51,256.71 : x
2. Step 2: Convert to fraction form
   72,465.75/99,968.72 = 51,256.71/x
3. Step 3: Cross multiply
   72,465.75x = 99,968.72 × 51,256.71
4. Step 4: Simplify right side
   72,465.75x = 5,124,067,433.83
5. Step 5: Solve for x
   x = 5,124,067,433.83/72,465.75
6. Step 6: Final answer
   x = 70,710.20