Finding the Fourth Proportional to 13,405.83, 18,498.56 and 7,436.01

Step by Step Solution

1. Step 1: Write the proportion equation
   13,405.83 : 18,498.56 = 7,436.01 : x
2. Step 2: Convert to fraction form
   13,405.83/18,498.56 = 7,436.01/x
3. Step 3: Cross multiply
   13,405.83x = 18,498.56 × 7,436.01
4. Step 4: Simplify right side
   13,405.83x = 137,555,477.15
5. Step 5: Solve for x
   x = 137,555,477.15/13,405.83
6. Step 6: Final answer
   x = 10,260.87