Finding the Fourth Proportional to 13,103.55, 19,560.32 and 12,127.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,103.55 : 19,560.32 = 12,127.94 : x
2. Step 2: Convert to fraction form
   13,103.55/19,560.32 = 12,127.94/x
3. Step 3: Cross multiply
   13,103.55x = 19,560.32 × 12,127.94
4. Step 4: Simplify right side
   13,103.55x = 237,226,426.40
5. Step 5: Solve for x
   x = 237,226,426.40/13,103.55
6. Step 6: Final answer
   x = 18,103.99