Finding the Fourth Proportional to 21,934.05, 32,903.81 and 7,139

Step by Step Solution

1. Step 1: Write the proportion equation
   21,934.05 : 32,903.81 = 7,139 : x
2. Step 2: Convert to fraction form
   21,934.05/32,903.81 = 7,139/x
3. Step 3: Cross multiply
   21,934.05x = 32,903.81 × 7,139
4. Step 4: Simplify right side
   21,934.05x = 234,900,299.59
5. Step 5: Solve for x
   x = 234,900,299.59/21,934.05
6. Step 6: Final answer
   x = 10,709.39