Finding the Fourth Proportional to 13,498.80, 20,249.67 and 5,185.86

Step by Step Solution

1. Step 1: Write the proportion equation
   13,498.80 : 20,249.67 = 5,185.86 : x
2. Step 2: Convert to fraction form
   13,498.80/20,249.67 = 5,185.86/x
3. Step 3: Cross multiply
   13,498.80x = 20,249.67 × 5,185.86
4. Step 4: Simplify right side
   13,498.80x = 105,011,953.67
5. Step 5: Solve for x
   x = 105,011,953.67/13,498.80
6. Step 6: Final answer
   x = 7,779.35