Finding the Fourth Proportional to 13,667.90, 18,861.62 and 7,701.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.90 : 18,861.62 = 7,701.49 : x
2. Step 2: Convert to fraction form
   13,667.90/18,861.62 = 7,701.49/x
3. Step 3: Cross multiply
   13,667.90x = 18,861.62 × 7,701.49
4. Step 4: Simplify right side
   13,667.90x = 145,262,548.93
5. Step 5: Solve for x
   x = 145,262,548.93/13,667.90
6. Step 6: Final answer
   x = 10,628.01