Finding the Fourth Proportional to 21,760.61, 30,032.06 and 12,810.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,760.61 : 30,032.06 = 12,810.32 : x
2. Step 2: Convert to fraction form
   21,760.61/30,032.06 = 12,810.32/x
3. Step 3: Cross multiply
   21,760.61x = 30,032.06 × 12,810.32
4. Step 4: Simplify right side
   21,760.61x = 384,720,234.81
5. Step 5: Solve for x
   x = 384,720,234.81/21,760.61
6. Step 6: Final answer
   x = 17,679.66