Finding the Fourth Proportional to 13,442.98, 18,549.90 and 7,776.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,442.98 : 18,549.90 = 7,776.82 : x
2. Step 2: Convert to fraction form
   13,442.98/18,549.90 = 7,776.82/x
3. Step 3: Cross multiply
   13,442.98x = 18,549.90 × 7,776.82
4. Step 4: Simplify right side
   13,442.98x = 144,259,233.32
5. Step 5: Solve for x
   x = 144,259,233.32/13,442.98
6. Step 6: Final answer
   x = 10,731.19