Finding the Fourth Proportional to 72,464.63, 99,967.16 and 51,255.59

Step by Step Solution

1. Step 1: Write the proportion equation
   72,464.63 : 99,967.16 = 51,255.59 : x
2. Step 2: Convert to fraction form
   72,464.63/99,967.16 = 51,255.59/x
3. Step 3: Cross multiply
   72,464.63x = 99,967.16 × 51,255.59
4. Step 4: Simplify right side
   72,464.63x = 5,123,875,394.73
5. Step 5: Solve for x
   x = 5,123,875,394.73/72,464.63
6. Step 6: Final answer
   x = 70,708.64