Finding the Fourth Proportional to 21,355.86, 32,011.50 and 7,311.75

Step by Step Solution

1. Step 1: Write the proportion equation
   21,355.86 : 32,011.50 = 7,311.75 : x
2. Step 2: Convert to fraction form
   21,355.86/32,011.50 = 7,311.75/x
3. Step 3: Cross multiply
   21,355.86x = 32,011.50 × 7,311.75
4. Step 4: Simplify right side
   21,355.86x = 234,060,085.13
5. Step 5: Solve for x
   x = 234,060,085.13/21,355.86
6. Step 6: Final answer
   x = 10,959.99