Finding the Fourth Proportional to 21,780.32, 32,664.44 and 5,981.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,780.32 : 32,664.44 = 5,981.56 : x
2. Step 2: Convert to fraction form
   21,780.32/32,664.44 = 5,981.56/x
3. Step 3: Cross multiply
   21,780.32x = 32,664.44 × 5,981.56
4. Step 4: Simplify right side
   21,780.32x = 195,384,307.73
5. Step 5: Solve for x
   x = 195,384,307.73/21,780.32
6. Step 6: Final answer
   x = 8,970.68