Finding the Fourth Proportional to 80,359.98, 120,526.20 and 21,196.23

Step by Step Solution

1. Step 1: Write the proportion equation
   80,359.98 : 120,526.20 = 21,196.23 : x
2. Step 2: Convert to fraction form
   80,359.98/120,526.20 = 21,196.23/x
3. Step 3: Cross multiply
   80,359.98x = 120,526.20 × 21,196.23
4. Step 4: Simplify right side
   80,359.98x = 2,554,701,056.23
5. Step 5: Solve for x
   x = 2,554,701,056.23/80,359.98
6. Step 6: Final answer
   x = 31,790.71