Finding the Fourth Proportional to 71,828.71, 99,078.69 and 51,653.63

Step by Step Solution

1. Step 1: Write the proportion equation
   71,828.71 : 99,078.69 = 51,653.63 : x
2. Step 2: Convert to fraction form
   71,828.71/99,078.69 = 51,653.63/x
3. Step 3: Cross multiply
   71,828.71x = 99,078.69 × 51,653.63
4. Step 4: Simplify right side
   71,828.71x = 5,117,774,435.54
5. Step 5: Solve for x
   x = 5,117,774,435.54/71,828.71
6. Step 6: Final answer
   x = 71,249.71