Finding the Fourth Proportional to 12,699.47, 19,050.45 and 4,378.38

Step by Step Solution

1. Step 1: Write the proportion equation
   12,699.47 : 19,050.45 = 4,378.38 : x
2. Step 2: Convert to fraction form
   12,699.47/19,050.45 = 4,378.38/x
3. Step 3: Cross multiply
   12,699.47x = 19,050.45 × 4,378.38
4. Step 4: Simplify right side
   12,699.47x = 83,410,109.27
5. Step 5: Solve for x
   x = 83,410,109.27/12,699.47
6. Step 6: Final answer
   x = 6,568.00