Finding the Fourth Proportional to 21,366.87, 32,061.78 and 10,978.62

Step by Step Solution

1. Step 1: Write the proportion equation
   21,366.87 : 32,061.78 = 10,978.62 : x
2. Step 2: Convert to fraction form
   21,366.87/32,061.78 = 10,978.62/x
3. Step 3: Cross multiply
   21,366.87x = 32,061.78 × 10,978.62
4. Step 4: Simplify right side
   21,366.87x = 351,994,099.14
5. Step 5: Solve for x
   x = 351,994,099.14/21,366.87
6. Step 6: Final answer
   x = 16,473.83