Finding the Fourth Proportional to 12,456.08, 17,188.89 and 6,790.70

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.08 : 17,188.89 = 6,790.70 : x
2. Step 2: Convert to fraction form
   12,456.08/17,188.89 = 6,790.70/x
3. Step 3: Cross multiply
   12,456.08x = 17,188.89 × 6,790.70
4. Step 4: Simplify right side
   12,456.08x = 116,724,595.32
5. Step 5: Solve for x
   x = 116,724,595.32/12,456.08
6. Step 6: Final answer
   x = 9,370.89