Finding the Fourth Proportional to 76,815, 106,033.86 and 51,679.08

Step by Step Solution

1. Step 1: Write the proportion equation
   76,815 : 106,033.86 = 51,679.08 : x
2. Step 2: Convert to fraction form
   76,815/106,033.86 = 51,679.08/x
3. Step 3: Cross multiply
   76,815x = 106,033.86 × 51,679.08
4. Step 4: Simplify right side
   76,815x = 5,479,732,333.65
5. Step 5: Solve for x
   x = 5,479,732,333.65/76,815
6. Step 6: Final answer
   x = 71,336.75