Finding the Fourth Proportional to 20,131.97, 30,191.12 and 7,649.00

Step by Step Solution

1. Step 1: Write the proportion equation
   20,131.97 : 30,191.12 = 7,649.00 : x
2. Step 2: Convert to fraction form
   20,131.97/30,191.12 = 7,649.00/x
3. Step 3: Cross multiply
   20,131.97x = 30,191.12 × 7,649.00
4. Step 4: Simplify right side
   20,131.97x = 230,931,725.92
5. Step 5: Solve for x
   x = 230,931,725.92/20,131.97
6. Step 6: Final answer
   x = 11,470.90