Finding the Fourth Proportional to 12,146.19, 18,204.69 and 5,123.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,146.19 : 18,204.69 = 5,123.49 : x
2. Step 2: Convert to fraction form
   12,146.19/18,204.69 = 5,123.49/x
3. Step 3: Cross multiply
   12,146.19x = 18,204.69 × 5,123.49
4. Step 4: Simplify right side
   12,146.19x = 93,271,547.17
5. Step 5: Solve for x
   x = 93,271,547.17/12,146.19
6. Step 6: Final answer
   x = 7,679.08