Finding the Fourth Proportional to 12,700.48, 19,050.56 and 5,678.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.48 : 19,050.56 = 5,678.64 : x
2. Step 2: Convert to fraction form
   12,700.48/19,050.56 = 5,678.64/x
3. Step 3: Cross multiply
   12,700.48x = 19,050.56 × 5,678.64
4. Step 4: Simplify right side
   12,700.48x = 108,181,272.04
5. Step 5: Solve for x
   x = 108,181,272.04/12,700.48
6. Step 6: Final answer
   x = 8,517.89