Finding the Fourth Proportional to 13,395.10, 18,484.92 and 7,729.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,395.10 : 18,484.92 = 7,729.86 : x
2. Step 2: Convert to fraction form
   13,395.10/18,484.92 = 7,729.86/x
3. Step 3: Cross multiply
   13,395.10x = 18,484.92 × 7,729.86
4. Step 4: Simplify right side
   13,395.10x = 142,885,843.71
5. Step 5: Solve for x
   x = 142,885,843.71/13,395.10
6. Step 6: Final answer
   x = 10,667.02