Finding the Fourth Proportional to 51,173.91, 70,619.85 and 28,513.89

Step by Step Solution

1. Step 1: Write the proportion equation
   51,173.91 : 70,619.85 = 28,513.89 : x
2. Step 2: Convert to fraction form
   51,173.91/70,619.85 = 28,513.89/x
3. Step 3: Cross multiply
   51,173.91x = 70,619.85 × 28,513.89
4. Step 4: Simplify right side
   51,173.91x = 2,013,646,634.72
5. Step 5: Solve for x
   x = 2,013,646,634.72/51,173.91
6. Step 6: Final answer
   x = 39,349.09