Finding the Fourth Proportional to 21,111.29, 31,670.76 and 7,069.94

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.29 : 31,670.76 = 7,069.94 : x
2. Step 2: Convert to fraction form
   21,111.29/31,670.76 = 7,069.94/x
3. Step 3: Cross multiply
   21,111.29x = 31,670.76 × 7,069.94
4. Step 4: Simplify right side
   21,111.29x = 223,910,214.60
5. Step 5: Solve for x
   x = 223,910,214.60/21,111.29
6. Step 6: Final answer
   x = 10,606.19