Finding the Fourth Proportional to 13,746.69, 18,967.55 and 7,779.81

Step by Step Solution

1. Step 1: Write the proportion equation
   13,746.69 : 18,967.55 = 7,779.81 : x
2. Step 2: Convert to fraction form
   13,746.69/18,967.55 = 7,779.81/x
3. Step 3: Cross multiply
   13,746.69x = 18,967.55 × 7,779.81
4. Step 4: Simplify right side
   13,746.69x = 147,563,896.27
5. Step 5: Solve for x
   x = 147,563,896.27/13,746.69
6. Step 6: Final answer
   x = 10,734.50