Finding the Fourth Proportional to 80,386.26, 120,585.15 and 21,221.34

Step by Step Solution

1. Step 1: Write the proportion equation
   80,386.26 : 120,585.15 = 21,221.34 : x
2. Step 2: Convert to fraction form
   80,386.26/120,585.15 = 21,221.34/x
3. Step 3: Cross multiply
   80,386.26x = 120,585.15 × 21,221.34
4. Step 4: Simplify right side
   80,386.26x = 2,558,978,467.10
5. Step 5: Solve for x
   x = 2,558,978,467.10/80,386.26
6. Step 6: Final answer
   x = 31,833.53