Finding the Fourth Proportional to 21,758.76, 30,026.70 and 12,327.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,758.76 : 30,026.70 = 12,327.12 : x
2. Step 2: Convert to fraction form
   21,758.76/30,026.70 = 12,327.12/x
3. Step 3: Cross multiply
   21,758.76x = 30,026.70 × 12,327.12
4. Step 4: Simplify right side
   21,758.76x = 370,142,734.10
5. Step 5: Solve for x
   x = 370,142,734.10/21,758.76
6. Step 6: Final answer
   x = 17,011.21