Finding the Fourth Proportional to 21,659.94, 32,515.83 and 12,898.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,659.94 : 32,515.83 = 12,898.98 : x
2. Step 2: Convert to fraction form
   21,659.94/32,515.83 = 12,898.98/x
3. Step 3: Cross multiply
   21,659.94x = 32,515.83 × 12,898.98
4. Step 4: Simplify right side
   21,659.94x = 419,421,040.85
5. Step 5: Solve for x
   x = 419,421,040.85/21,659.94
6. Step 6: Final answer
   x = 19,363.91