Finding the Fourth Proportional to 21,423.61, 32,115.73 and 7,380.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,423.61 : 32,115.73 = 7,380.29 : x
2. Step 2: Convert to fraction form
   21,423.61/32,115.73 = 7,380.29/x
3. Step 3: Cross multiply
   21,423.61x = 32,115.73 × 7,380.29
4. Step 4: Simplify right side
   21,423.61x = 237,023,462.80
5. Step 5: Solve for x
   x = 237,023,462.80/21,423.61
6. Step 6: Final answer
   x = 11,063.66