Finding the Fourth Proportional to 70,106.82, 105,053.82 and 51,399.31

Step by Step Solution

1. Step 1: Write the proportion equation
   70,106.82 : 105,053.82 = 51,399.31 : x
2. Step 2: Convert to fraction form
   70,106.82/105,053.82 = 51,399.31/x
3. Step 3: Cross multiply
   70,106.82x = 105,053.82 × 51,399.31
4. Step 4: Simplify right side
   70,106.82x = 5,399,693,860.86
5. Step 5: Solve for x
   x = 5,399,693,860.86/70,106.82
6. Step 6: Final answer
   x = 77,020.95