Finding the Fourth Proportional to 51,146.48, 70,581.94 and 28,485.72

Step by Step Solution

1. Step 1: Write the proportion equation
   51,146.48 : 70,581.94 = 28,485.72 : x
2. Step 2: Convert to fraction form
   51,146.48/70,581.94 = 28,485.72/x
3. Step 3: Cross multiply
   51,146.48x = 70,581.94 × 28,485.72
4. Step 4: Simplify right side
   51,146.48x = 2,010,577,379.90
5. Step 5: Solve for x
   x = 2,010,577,379.90/51,146.48
6. Step 6: Final answer
   x = 39,310.18