Finding the Fourth Proportional to 51,477, 71,039.76 and 28,815.92

Step by Step Solution

1. Step 1: Write the proportion equation
   51,477 : 71,039.76 = 28,815.92 : x
2. Step 2: Convert to fraction form
   51,477/71,039.76 = 28,815.92/x
3. Step 3: Cross multiply
   51,477x = 71,039.76 × 28,815.92
4. Step 4: Simplify right side
   51,477x = 2,047,075,685.78
5. Step 5: Solve for x
   x = 2,047,075,685.78/51,477
6. Step 6: Final answer
   x = 39,766.80