Finding the Fourth Proportional to 21,375.32, 32,223.17 and 19,948.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,375.32 : 32,223.17 = 19,948.28 : x
2. Step 2: Convert to fraction form
   21,375.32/32,223.17 = 19,948.28/x
3. Step 3: Cross multiply
   21,375.32x = 32,223.17 × 19,948.28
4. Step 4: Simplify right side
   21,375.32x = 642,796,817.65
5. Step 5: Solve for x
   x = 642,796,817.65/21,375.32
6. Step 6: Final answer
   x = 30,071.92