Finding the Fourth Proportional to 21,303.32, 31,959.59 and 8,155.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,303.32 : 31,959.59 = 8,155.69 : x
2. Step 2: Convert to fraction form
   21,303.32/31,959.59 = 8,155.69/x
3. Step 3: Cross multiply
   21,303.32x = 31,959.59 × 8,155.69
4. Step 4: Simplify right side
   21,303.32x = 260,652,410.83
5. Step 5: Solve for x
   x = 260,652,410.83/21,303.32
6. Step 6: Final answer
   x = 12,235.30