Finding the Fourth Proportional to 20,106.10, 30,155.55 and 12,697.30

Step by Step Solution

1. Step 1: Write the proportion equation
   20,106.10 : 30,155.55 = 12,697.30 : x
2. Step 2: Convert to fraction form
   20,106.10/30,155.55 = 12,697.30/x
3. Step 3: Cross multiply
   20,106.10x = 30,155.55 × 12,697.30
4. Step 4: Simplify right side
   20,106.10x = 382,894,065.02
5. Step 5: Solve for x
   x = 382,894,065.02/20,106.10
6. Step 6: Final answer
   x = 19,043.68