Finding the Fourth Proportional to 6,828.51, 10,242.69 and 3,129.69

Step by Step Solution

1. Step 1: Write the proportion equation
   6,828.51 : 10,242.69 = 3,129.69 : x
2. Step 2: Convert to fraction form
   6,828.51/10,242.69 = 3,129.69/x
3. Step 3: Cross multiply
   6,828.51x = 10,242.69 × 3,129.69
4. Step 4: Simplify right side
   6,828.51x = 32,056,444.47
5. Step 5: Solve for x
   x = 32,056,444.47/6,828.51
6. Step 6: Final answer
   x = 4,694.50