Finding the Fourth Proportional to 51,091.18, 70,504.70 and 28,429.31

Step by Step Solution

1. Step 1: Write the proportion equation
   51,091.18 : 70,504.70 = 28,429.31 : x
2. Step 2: Convert to fraction form
   51,091.18/70,504.70 = 28,429.31/x
3. Step 3: Cross multiply
   51,091.18x = 70,504.70 × 28,429.31
4. Step 4: Simplify right side
   51,091.18x = 2,004,400,006.87
5. Step 5: Solve for x
   x = 2,004,400,006.87/51,091.18
6. Step 6: Final answer
   x = 39,231.82