Finding the Fourth Proportional to 21,113.30, 31,657.38 and 7,069.92

Step by Step Solution

1. Step 1: Write the proportion equation
   21,113.30 : 31,657.38 = 7,069.92 : x
2. Step 2: Convert to fraction form
   21,113.30/31,657.38 = 7,069.92/x
3. Step 3: Cross multiply
   21,113.30x = 31,657.38 × 7,069.92
4. Step 4: Simplify right side
   21,113.30x = 223,815,144.01
5. Step 5: Solve for x
   x = 223,815,144.01/21,113.30
6. Step 6: Final answer
   x = 10,600.67