Finding the Fourth Proportional to 12,685.30, 19,016.43 and 4,899.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,685.30 : 19,016.43 = 4,899.94 : x
2. Step 2: Convert to fraction form
   12,685.30/19,016.43 = 4,899.94/x
3. Step 3: Cross multiply
   12,685.30x = 19,016.43 × 4,899.94
4. Step 4: Simplify right side
   12,685.30x = 93,179,366.01
5. Step 5: Solve for x
   x = 93,179,366.01/12,685.30
6. Step 6: Final answer
   x = 7,345.46