Finding the Fourth Proportional to 21,870.92, 32,811.57 and 7,079.83

Step by Step Solution

1. Step 1: Write the proportion equation
   21,870.92 : 32,811.57 = 7,079.83 : x
2. Step 2: Convert to fraction form
   21,870.92/32,811.57 = 7,079.83/x
3. Step 3: Cross multiply
   21,870.92x = 32,811.57 × 7,079.83
4. Step 4: Simplify right side
   21,870.92x = 232,300,255.60
5. Step 5: Solve for x
   x = 232,300,255.60/21,870.92
6. Step 6: Final answer
   x = 10,621.42