Finding the Fourth Proportional to 13,050.85, 18,009.92 and 7,385.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,050.85 : 18,009.92 = 7,385.50 : x
2. Step 2: Convert to fraction form
   13,050.85/18,009.92 = 7,385.50/x
3. Step 3: Cross multiply
   13,050.85x = 18,009.92 × 7,385.50
4. Step 4: Simplify right side
   13,050.85x = 133,012,162.29
5. Step 5: Solve for x
   x = 133,012,162.29/13,050.85
6. Step 6: Final answer
   x = 10,191.84