Finding the Fourth Proportional to 34,308.51, 51,455.55 and 9,678.75

Step by Step Solution

1. Step 1: Write the proportion equation
   34,308.51 : 51,455.55 = 9,678.75 : x
2. Step 2: Convert to fraction form
   34,308.51/51,455.55 = 9,678.75/x
3. Step 3: Cross multiply
   34,308.51x = 51,455.55 × 9,678.75
4. Step 4: Simplify right side
   34,308.51x = 498,025,404.56
5. Step 5: Solve for x
   x = 498,025,404.56/34,308.51
6. Step 6: Final answer
   x = 14,516.09