Finding the Fourth Proportional to 12,868.50, 19,302.18 and 4,974.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,868.50 : 19,302.18 = 4,974.78 : x
2. Step 2: Convert to fraction form
   12,868.50/19,302.18 = 4,974.78/x
3. Step 3: Cross multiply
   12,868.50x = 19,302.18 × 4,974.78
4. Step 4: Simplify right side
   12,868.50x = 96,024,099.02
5. Step 5: Solve for x
   x = 96,024,099.02/12,868.50
6. Step 6: Final answer
   x = 7,461.95