Finding the Fourth Proportional to 13,051.15, 18,011.46 and 7,385.89

Step by Step Solution

1. Step 1: Write the proportion equation
   13,051.15 : 18,011.46 = 7,385.89 : x
2. Step 2: Convert to fraction form
   13,051.15/18,011.46 = 7,385.89/x
3. Step 3: Cross multiply
   13,051.15x = 18,011.46 × 7,385.89
4. Step 4: Simplify right side
   13,051.15x = 133,030,662.30
5. Step 5: Solve for x
   x = 133,030,662.30/13,051.15
6. Step 6: Final answer
   x = 10,193.02