Finding the Fourth Proportional to 13,380.58, 18,475.05 and 12,385.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,380.58 : 18,475.05 = 12,385.42 : x
2. Step 2: Convert to fraction form
   13,380.58/18,475.05 = 12,385.42/x
3. Step 3: Cross multiply
   13,380.58x = 18,475.05 × 12,385.42
4. Step 4: Simplify right side
   13,380.58x = 228,821,253.77
5. Step 5: Solve for x
   x = 228,821,253.77/13,380.58
6. Step 6: Final answer
   x = 17,101.00