Finding the Fourth Proportional to 51,429.06, 70,978.67 and 28,769.31

Step by Step Solution

1. Step 1: Write the proportion equation
   51,429.06 : 70,978.67 = 28,769.31 : x
2. Step 2: Convert to fraction form
   51,429.06/70,978.67 = 28,769.31/x
3. Step 3: Cross multiply
   51,429.06x = 70,978.67 × 28,769.31
4. Step 4: Simplify right side
   51,429.06x = 2,042,007,216.77
5. Step 5: Solve for x
   x = 2,042,007,216.77/51,429.06
6. Step 6: Final answer
   x = 39,705.32