Finding the Fourth Proportional to 12,910.19, 19,379.86 and 5,124.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910.19 : 19,379.86 = 5,124.47 : x
2. Step 2: Convert to fraction form
   12,910.19/19,379.86 = 5,124.47/x
3. Step 3: Cross multiply
   12,910.19x = 19,379.86 × 5,124.47
4. Step 4: Simplify right side
   12,910.19x = 99,311,401.46
5. Step 5: Solve for x
   x = 99,311,401.46/12,910.19
6. Step 6: Final answer
   x = 7,692.48