Finding the Fourth Proportional to 13,746.72, 18,975.04 and 9,779.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,746.72 : 18,975.04 = 9,779.34 : x
2. Step 2: Convert to fraction form
   13,746.72/18,975.04 = 9,779.34/x
3. Step 3: Cross multiply
   13,746.72x = 18,975.04 × 9,779.34
4. Step 4: Simplify right side
   13,746.72x = 185,563,367.67
5. Step 5: Solve for x
   x = 185,563,367.67/13,746.72
6. Step 6: Final answer
   x = 13,498.74