Finding the Fourth Proportional to 13,405.10, 18,499.01 and 7,436.61

Step by Step Solution

1. Step 1: Write the proportion equation
   13,405.10 : 18,499.01 = 7,436.61 : x
2. Step 2: Convert to fraction form
   13,405.10/18,499.01 = 7,436.61/x
3. Step 3: Cross multiply
   13,405.10x = 18,499.01 × 7,436.61
4. Step 4: Simplify right side
   13,405.10x = 137,569,885.57
5. Step 5: Solve for x
   x = 137,569,885.57/13,405.10
6. Step 6: Final answer
   x = 10,262.51