Finding the Fourth Proportional to 12,456.04, 17,188.69 and 7,077.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,456.04 : 17,188.69 = 7,077.76 : x
2. Step 2: Convert to fraction form
   12,456.04/17,188.69 = 7,077.76/x
3. Step 3: Cross multiply
   12,456.04x = 17,188.69 × 7,077.76
4. Step 4: Simplify right side
   12,456.04x = 121,657,422.53
5. Step 5: Solve for x
   x = 121,657,422.53/12,456.04
6. Step 6: Final answer
   x = 9,766.94