Finding the Fourth Proportional to 13,342.15, 18,412.88 and 7,677.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,342.15 : 18,412.88 = 7,677.76 : x
2. Step 2: Convert to fraction form
   13,342.15/18,412.88 = 7,677.76/x
3. Step 3: Cross multiply
   13,342.15x = 18,412.88 × 7,677.76
4. Step 4: Simplify right side
   13,342.15x = 141,369,673.55
5. Step 5: Solve for x
   x = 141,369,673.55/13,342.15
6. Step 6: Final answer
   x = 10,595.72