Finding the Fourth Proportional to 12,900.76, 19,357.80 and 5,503.23

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900.76 : 19,357.80 = 5,503.23 : x
2. Step 2: Convert to fraction form
   12,900.76/19,357.80 = 5,503.23/x
3. Step 3: Cross multiply
   12,900.76x = 19,357.80 × 5,503.23
4. Step 4: Simplify right side
   12,900.76x = 106,530,425.69
5. Step 5: Solve for x
   x = 106,530,425.69/12,900.76
6. Step 6: Final answer
   x = 8,257.69