Finding the Fourth Proportional to 23,783.92, 35,679.98 and 7,990.47

Step by Step Solution

1. Step 1: Write the proportion equation
   23,783.92 : 35,679.98 = 7,990.47 : x
2. Step 2: Convert to fraction form
   23,783.92/35,679.98 = 7,990.47/x
3. Step 3: Cross multiply
   23,783.92x = 35,679.98 × 7,990.47
4. Step 4: Simplify right side
   23,783.92x = 285,099,829.77
5. Step 5: Solve for x
   x = 285,099,829.77/23,783.92
6. Step 6: Final answer
   x = 11,987.08