Finding the Fourth Proportional to 21,456.32, 32,173.49 and 8,972.93

Step by Step Solution

1. Step 1: Write the proportion equation
   21,456.32 : 32,173.49 = 8,972.93 : x
2. Step 2: Convert to fraction form
   21,456.32/32,173.49 = 8,972.93/x
3. Step 3: Cross multiply
   21,456.32x = 32,173.49 × 8,972.93
4. Step 4: Simplify right side
   21,456.32x = 288,690,267.89
5. Step 5: Solve for x
   x = 288,690,267.89/21,456.32
6. Step 6: Final answer
   x = 13,454.79