Finding the Fourth Proportional to 13,667.21, 18,862.56 and 7,700.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,667.21 : 18,862.56 = 7,700.06 : x
2. Step 2: Convert to fraction form
   13,667.21/18,862.56 = 7,700.06/x
3. Step 3: Cross multiply
   13,667.21x = 18,862.56 × 7,700.06
4. Step 4: Simplify right side
   13,667.21x = 145,242,843.75
5. Step 5: Solve for x
   x = 145,242,843.75/13,667.21
6. Step 6: Final answer
   x = 10,627.10