Finding the Fourth Proportional to 12,687.30, 19,019.43 and 4,901.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.30 : 19,019.43 = 4,901.94 : x
2. Step 2: Convert to fraction form
   12,687.30/19,019.43 = 4,901.94/x
3. Step 3: Cross multiply
   12,687.30x = 19,019.43 × 4,901.94
4. Step 4: Simplify right side
   12,687.30x = 93,232,104.69
5. Step 5: Solve for x
   x = 93,232,104.69/12,687.30
6. Step 6: Final answer
   x = 7,348.46