Finding the Fourth Proportional to 21,089.84, 29,105.50 and 12,592.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,089.84 : 29,105.50 = 12,592.32 : x
2. Step 2: Convert to fraction form
   21,089.84/29,105.50 = 12,592.32/x
3. Step 3: Cross multiply
   21,089.84x = 29,105.50 × 12,592.32
4. Step 4: Simplify right side
   21,089.84x = 366,505,769.76
5. Step 5: Solve for x
   x = 366,505,769.76/21,089.84
6. Step 6: Final answer
   x = 17,378.31