Finding the Fourth Proportional to 71,578.65, 98,789.31 and 51,501.99

Step by Step Solution

1. Step 1: Write the proportion equation
   71,578.65 : 98,789.31 = 51,501.99 : x
2. Step 2: Convert to fraction form
   71,578.65/98,789.31 = 51,501.99/x
3. Step 3: Cross multiply
   71,578.65x = 98,789.31 × 51,501.99
4. Step 4: Simplify right side
   71,578.65x = 5,087,846,055.73
5. Step 5: Solve for x
   x = 5,087,846,055.73/71,578.65
6. Step 6: Final answer
   x = 71,080.50