Finding the Fourth Proportional to 13,405.57, 18,499.71 and 7,437.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,405.57 : 18,499.71 = 7,437.24 : x
2. Step 2: Convert to fraction form
   13,405.57/18,499.71 = 7,437.24/x
3. Step 3: Cross multiply
   13,405.57x = 18,499.71 × 7,437.24
4. Step 4: Simplify right side
   13,405.57x = 137,586,848.04
5. Step 5: Solve for x
   x = 137,586,848.04/13,405.57
6. Step 6: Final answer
   x = 10,263.41