Finding the Fourth Proportional to 12,820.47, 19,265.34 and 12,098.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820.47 : 19,265.34 = 12,098.76 : x
2. Step 2: Convert to fraction form
   12,820.47/19,265.34 = 12,098.76/x
3. Step 3: Cross multiply
   12,820.47x = 19,265.34 × 12,098.76
4. Step 4: Simplify right side
   12,820.47x = 233,086,724.98
5. Step 5: Solve for x
   x = 233,086,724.98/12,820.47
6. Step 6: Final answer
   x = 18,180.83