Finding the Fourth Proportional to 12,821, 19,226.88 and 4,498.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,821 : 19,226.88 = 4,498.88 : x
2. Step 2: Convert to fraction form
   12,821/19,226.88 = 4,498.88/x
3. Step 3: Cross multiply
   12,821x = 19,226.88 × 4,498.88
4. Step 4: Simplify right side
   12,821x = 86,499,425.89
5. Step 5: Solve for x
   x = 86,499,425.89/12,821
6. Step 6: Final answer
   x = 6,746.70