Finding the Fourth Proportional to 12,878.99, 17,770.83 and 7,502.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,878.99 : 17,770.83 = 7,502.31 : x
2. Step 2: Convert to fraction form
   12,878.99/17,770.83 = 7,502.31/x
3. Step 3: Cross multiply
   12,878.99x = 17,770.83 × 7,502.31
4. Step 4: Simplify right side
   12,878.99x = 133,322,275.62
5. Step 5: Solve for x
   x = 133,322,275.62/12,878.99
6. Step 6: Final answer
   x = 10,351.92