Finding the Fourth Proportional to 21,932.86, 32,891.52 and 7,139.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,932.86 : 32,891.52 = 7,139.02 : x
2. Step 2: Convert to fraction form
   21,932.86/32,891.52 = 7,139.02/x
3. Step 3: Cross multiply
   21,932.86x = 32,891.52 × 7,139.02
4. Step 4: Simplify right side
   21,932.86x = 234,813,219.11
5. Step 5: Solve for x
   x = 234,813,219.11/21,932.86
6. Step 6: Final answer
   x = 10,706.00