Finding the Fourth Proportional to 51,436.06, 70,988.33 and 28,776.31

Step by Step Solution

1. Step 1: Write the proportion equation
   51,436.06 : 70,988.33 = 28,776.31 : x
2. Step 2: Convert to fraction form
   51,436.06/70,988.33 = 28,776.31/x
3. Step 3: Cross multiply
   51,436.06x = 70,988.33 × 28,776.31
4. Step 4: Simplify right side
   51,436.06x = 2,042,782,190.46
5. Step 5: Solve for x
   x = 2,042,782,190.46/51,436.06
6. Step 6: Final answer
   x = 39,714.98