Finding the Fourth Proportional to 21,870.57, 32,811.06 and 7,079.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,870.57 : 32,811.06 = 7,079.48 : x
2. Step 2: Convert to fraction form
   21,870.57/32,811.06 = 7,079.48/x
3. Step 3: Cross multiply
   21,870.57x = 32,811.06 × 7,079.48
4. Step 4: Simplify right side
   21,870.57x = 232,285,289.18
5. Step 5: Solve for x
   x = 232,285,289.18/21,870.57
6. Step 6: Final answer
   x = 10,620.91