Finding the Fourth Proportional to 21,928.10, 32,892.55 and 7,136.96

Step by Step Solution

1. Step 1: Write the proportion equation
   21,928.10 : 32,892.55 = 7,136.96 : x
2. Step 2: Convert to fraction form
   21,928.10/32,892.55 = 7,136.96/x
3. Step 3: Cross multiply
   21,928.10x = 32,892.55 × 7,136.96
4. Step 4: Simplify right side
   21,928.10x = 234,752,631.34
5. Step 5: Solve for x
   x = 234,752,631.34/21,928.10
6. Step 6: Final answer
   x = 10,705.56