Finding the Fourth Proportional to 20,430.41, 28,196.01 and 13,730.00

Step by Step Solution

1. Step 1: Write the proportion equation
   20,430.41 : 28,196.01 = 13,730.00 : x
2. Step 2: Convert to fraction form
   20,430.41/28,196.01 = 13,730.00/x
3. Step 3: Cross multiply
   20,430.41x = 28,196.01 × 13,730.00
4. Step 4: Simplify right side
   20,430.41x = 387,131,076.32
5. Step 5: Solve for x
   x = 387,131,076.32/20,430.41
6. Step 6: Final answer
   x = 18,948.77