Finding the Fourth Proportional to 12,764.15, 19,113.41 and 7,818.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,764.15 : 19,113.41 = 7,818.80 : x
2. Step 2: Convert to fraction form
   12,764.15/19,113.41 = 7,818.80/x
3. Step 3: Cross multiply
   12,764.15x = 19,113.41 × 7,818.80
4. Step 4: Simplify right side
   12,764.15x = 149,443,795.45
5. Step 5: Solve for x
   x = 149,443,795.45/12,764.15
6. Step 6: Final answer
   x = 11,708.09