Finding the Fourth Proportional to 12,429.18, 18,635.40 and 4,106.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.18 : 18,635.40 = 4,106.25 : x
2. Step 2: Convert to fraction form
   12,429.18/18,635.40 = 4,106.25/x
3. Step 3: Cross multiply
   12,429.18x = 18,635.40 × 4,106.25
4. Step 4: Simplify right side
   12,429.18x = 76,521,611.25
5. Step 5: Solve for x
   x = 76,521,611.25/12,429.18
6. Step 6: Final answer
   x = 6,156.61