Finding the Fourth Proportional to 13,405.02, 18,498.30 and 7,436.58

Step by Step Solution

1. Step 1: Write the proportion equation
   13,405.02 : 18,498.30 = 7,436.58 : x
2. Step 2: Convert to fraction form
   13,405.02/18,498.30 = 7,436.58/x
3. Step 3: Cross multiply
   13,405.02x = 18,498.30 × 7,436.58
4. Step 4: Simplify right side
   13,405.02x = 137,564,087.81
5. Step 5: Solve for x
   x = 137,564,087.81/13,405.02
6. Step 6: Final answer
   x = 10,262.13