Finding the Fourth Proportional to 12,123.61, 16,730.42 and 6,818.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123.61 : 16,730.42 = 6,818.43 : x
2. Step 2: Convert to fraction form
   12,123.61/16,730.42 = 6,818.43/x
3. Step 3: Cross multiply
   12,123.61x = 16,730.42 × 6,818.43
4. Step 4: Simplify right side
   12,123.61x = 114,075,172.86
5. Step 5: Solve for x
   x = 114,075,172.86/12,123.61
6. Step 6: Final answer
   x = 9,409.34