Finding the Fourth Proportional to 12,930.77, 19,397.27 and 3,570.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,930.77 : 19,397.27 = 3,570.78 : x
2. Step 2: Convert to fraction form
   12,930.77/19,397.27 = 3,570.78/x
3. Step 3: Cross multiply
   12,930.77x = 19,397.27 × 3,570.78
4. Step 4: Simplify right side
   12,930.77x = 69,263,365.92
5. Step 5: Solve for x
   x = 69,263,365.92/12,930.77
6. Step 6: Final answer
   x = 5,356.48