Finding the Fourth Proportional to 12,817.82, 19,211.88 and 5,419.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,817.82 : 19,211.88 = 5,419.82 : x
2. Step 2: Convert to fraction form
   12,817.82/19,211.88 = 5,419.82/x
3. Step 3: Cross multiply
   12,817.82x = 19,211.88 × 5,419.82
4. Step 4: Simplify right side
   12,817.82x = 104,124,931.46
5. Step 5: Solve for x
   x = 104,124,931.46/12,817.82
6. Step 6: Final answer
   x = 8,123.45