Finding the Fourth Proportional to 20,196.45, 30,312.18 and 20,149.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,196.45 : 30,312.18 = 20,149.75 : x
2. Step 2: Convert to fraction form
   20,196.45/30,312.18 = 20,149.75/x
3. Step 3: Cross multiply
   20,196.45x = 30,312.18 × 20,149.75
4. Step 4: Simplify right side
   20,196.45x = 610,782,848.96
5. Step 5: Solve for x
   x = 610,782,848.96/20,196.45
6. Step 6: Final answer
   x = 30,242.09