Finding the Fourth Proportional to 51,436.53, 70,980.78 and 28,775.92

Step by Step Solution

1. Step 1: Write the proportion equation
   51,436.53 : 70,980.78 = 28,775.92 : x
2. Step 2: Convert to fraction form
   51,436.53/70,980.78 = 28,775.92/x
3. Step 3: Cross multiply
   51,436.53x = 70,980.78 × 28,775.92
4. Step 4: Simplify right side
   51,436.53x = 2,042,537,069.37
5. Step 5: Solve for x
   x = 2,042,537,069.37/51,436.53
6. Step 6: Final answer
   x = 39,709.85