Finding the Fourth Proportional to 13,404.81, 18,499.69 and 7,437.63

Step by Step Solution

1. Step 1: Write the proportion equation
   13,404.81 : 18,499.69 = 7,437.63 : x
2. Step 2: Convert to fraction form
   13,404.81/18,499.69 = 7,437.63/x
3. Step 3: Cross multiply
   13,404.81x = 18,499.69 × 7,437.63
4. Step 4: Simplify right side
   13,404.81x = 137,593,849.33
5. Step 5: Solve for x
   x = 137,593,849.33/13,404.81
6. Step 6: Final answer
   x = 10,264.51