Finding the Fourth Proportional to 13,124.94, 19,690.43 and 4,118.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,124.94 : 19,690.43 = 4,118.55 : x
2. Step 2: Convert to fraction form
   13,124.94/19,690.43 = 4,118.55/x
3. Step 3: Cross multiply
   13,124.94x = 19,690.43 × 4,118.55
4. Step 4: Simplify right side
   13,124.94x = 81,096,036.80
5. Step 5: Solve for x
   x = 81,096,036.80/13,124.94
6. Step 6: Final answer
   x = 6,178.78