Finding the Fourth Proportional to 21,776.61, 30,053.47 and 12,704.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,776.61 : 30,053.47 = 12,704.76 : x
2. Step 2: Convert to fraction form
   21,776.61/30,053.47 = 12,704.76/x
3. Step 3: Cross multiply
   21,776.61x = 30,053.47 × 12,704.76
4. Step 4: Simplify right side
   21,776.61x = 381,822,123.52
5. Step 5: Solve for x
   x = 381,822,123.52/21,776.61
6. Step 6: Final answer
   x = 17,533.59