Finding the Fourth Proportional to 21,933.05, 32,902.31 and 7,138.00

Step by Step Solution

1. Step 1: Write the proportion equation
   21,933.05 : 32,902.31 = 7,138.00 : x
2. Step 2: Convert to fraction form
   21,933.05/32,902.31 = 7,138.00/x
3. Step 3: Cross multiply
   21,933.05x = 32,902.31 × 7,138.00
4. Step 4: Simplify right side
   21,933.05x = 234,856,624.37
5. Step 5: Solve for x
   x = 234,856,624.37/21,933.05
6. Step 6: Final answer
   x = 10,707.89