Finding the Fourth Proportional to 21,778.42, 30,053.48 and 12,346.98

Step by Step Solution

1. Step 1: Write the proportion equation
   21,778.42 : 30,053.48 = 12,346.98 : x
2. Step 2: Convert to fraction form
   21,778.42/30,053.48 = 12,346.98/x
3. Step 3: Cross multiply
   21,778.42x = 30,053.48 × 12,346.98
4. Step 4: Simplify right side
   21,778.42x = 371,069,780.56
5. Step 5: Solve for x
   x = 371,069,780.56/21,778.42
6. Step 6: Final answer
   x = 17,038.42