Finding the Fourth Proportional to 51,066.57, 70,471.86 and 28,710.57

Step by Step Solution

1. Step 1: Write the proportion equation
   51,066.57 : 70,471.86 = 28,710.57 : x
2. Step 2: Convert to fraction form
   51,066.57/70,471.86 = 28,710.57/x
3. Step 3: Cross multiply
   51,066.57x = 70,471.86 × 28,710.57
4. Step 4: Simplify right side
   51,066.57x = 2,023,287,269.56
5. Step 5: Solve for x
   x = 2,023,287,269.56/51,066.57
6. Step 6: Final answer
   x = 39,620.58