Finding the Fourth Proportional to 12,678.73, 19,019.00 and 3,912.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,678.73 : 19,019.00 = 3,912.50 : x
2. Step 2: Convert to fraction form
   12,678.73/19,019.00 = 3,912.50/x
3. Step 3: Cross multiply
   12,678.73x = 19,019.00 × 3,912.50
4. Step 4: Simplify right side
   12,678.73x = 74,411,894.83
5. Step 5: Solve for x
   x = 74,411,894.83/12,678.73
6. Step 6: Final answer
   x = 5,869.03