Finding the Fourth Proportional to 12,429.59, 18,638.49 and 4,526.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.59 : 18,638.49 = 4,526.51 : x
2. Step 2: Convert to fraction form
   12,429.59/18,638.49 = 4,526.51/x
3. Step 3: Cross multiply
   12,429.59x = 18,638.49 × 4,526.51
4. Step 4: Simplify right side
   12,429.59x = 84,367,311.37
5. Step 5: Solve for x
   x = 84,367,311.37/12,429.59
6. Step 6: Final answer
   x = 6,787.62