Finding the Fourth Proportional to 12,911.34, 17,818.92 and 7,607.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,911.34 : 17,818.92 = 7,607.82 : x
2. Step 2: Convert to fraction form
   12,911.34/17,818.92 = 7,607.82/x
3. Step 3: Cross multiply
   12,911.34x = 17,818.92 × 7,607.82
4. Step 4: Simplify right side
   12,911.34x = 135,563,135.95
5. Step 5: Solve for x
   x = 135,563,135.95/12,911.34
6. Step 6: Final answer
   x = 10,499.54