Finding the Fourth Proportional to 12,820.88, 19,139.50 and 12,253.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.88 : 19,139.50 = 12,253.52 : x
2. Step 2: Convert to fraction form
   12,820.88/19,139.50 = 12,253.52/x
3. Step 3: Cross multiply
   12,820.88x = 19,139.50 × 12,253.52
4. Step 4: Simplify right side
   12,820.88x = 234,526,246.04
5. Step 5: Solve for x
   x = 234,526,246.04/12,820.88
6. Step 6: Final answer
   x = 18,292.52