Finding the Fourth Proportional to 12,678.16, 19,019.50 and 4,356.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,678.16 : 19,019.50 = 4,356.02 : x
2. Step 2: Convert to fraction form
   12,678.16/19,019.50 = 4,356.02/x
3. Step 3: Cross multiply
   12,678.16x = 19,019.50 × 4,356.02
4. Step 4: Simplify right side
   12,678.16x = 82,849,322.39
5. Step 5: Solve for x
   x = 82,849,322.39/12,678.16
6. Step 6: Final answer
   x = 6,534.81