Finding the Fourth Proportional to 21,110.63, 31,667.39 and 7,070.09

Step by Step Solution

1. Step 1: Write the proportion equation
   21,110.63 : 31,667.39 = 7,070.09 : x
2. Step 2: Convert to fraction form
   21,110.63/31,667.39 = 7,070.09/x
3. Step 3: Cross multiply
   21,110.63x = 31,667.39 × 7,070.09
4. Step 4: Simplify right side
   21,110.63x = 223,891,308.32
5. Step 5: Solve for x
   x = 223,891,308.32/21,110.63
6. Step 6: Final answer
   x = 10,605.62