Finding the Fourth Proportional to 13,320.15, 19,946.15 and 12,925.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.15 : 19,946.15 = 12,925.98 : x
2. Step 2: Convert to fraction form
   13,320.15/19,946.15 = 12,925.98/x
3. Step 3: Cross multiply
   13,320.15x = 19,946.15 × 12,925.98
4. Step 4: Simplify right side
   13,320.15x = 257,823,519.82
5. Step 5: Solve for x
   x = 257,823,519.82/13,320.15
6. Step 6: Final answer
   x = 19,355.91