Finding the Fourth Proportional to 21,113.72, 31,659.96 and 7,068.86

Step by Step Solution

1. Step 1: Write the proportion equation
   21,113.72 : 31,659.96 = 7,068.86 : x
2. Step 2: Convert to fraction form
   21,113.72/31,659.96 = 7,068.86/x
3. Step 3: Cross multiply
   21,113.72x = 31,659.96 × 7,068.86
4. Step 4: Simplify right side
   21,113.72x = 223,799,824.85
5. Step 5: Solve for x
   x = 223,799,824.85/21,113.72
6. Step 6: Final answer
   x = 10,599.73