Finding the Fourth Proportional to 8,429.30, 12,642.96 and 5,300.07

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.30 : 12,642.96 = 5,300.07 : x
2. Step 2: Convert to fraction form
   8,429.30/12,642.96 = 5,300.07/x
3. Step 3: Cross multiply
   8,429.30x = 12,642.96 × 5,300.07
4. Step 4: Simplify right side
   8,429.30x = 67,008,573.01
5. Step 5: Solve for x
   x = 67,008,573.01/8,429.30
6. Step 6: Final answer
   x = 7,949.48