Finding the Fourth Proportional to 21,810.87, 30,101.76 and 12,377.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,810.87 : 30,101.76 = 12,377.61 : x
2. Step 2: Convert to fraction form
   21,810.87/30,101.76 = 12,377.61/x
3. Step 3: Cross multiply
   21,810.87x = 30,101.76 × 12,377.61
4. Step 4: Simplify right side
   21,810.87x = 372,587,845.59
5. Step 5: Solve for x
   x = 372,587,845.59/21,810.87
6. Step 6: Final answer
   x = 17,082.67