Finding the Fourth Proportional to 9,211.74, 12,712.34 and 5,019.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,211.74 : 12,712.34 = 5,019.98 : x
2. Step 2: Convert to fraction form
   9,211.74/12,712.34 = 5,019.98/x
3. Step 3: Cross multiply
   9,211.74x = 12,712.34 × 5,019.98
4. Step 4: Simplify right side
   9,211.74x = 63,815,692.55
5. Step 5: Solve for x
   x = 63,815,692.55/9,211.74
6. Step 6: Final answer
   x = 6,927.65