Finding the Third Proportional to 21,870 and 29,376

Step by Step Solution

1. Step 1: Write the proportion equation
   21,870 : 29,376 = 29,376 : x
2. Step 2: Convert to fraction form
   21,870/29,376 = 29,376/x
3. Step 3: Cross multiply
   21,870x = 29,376 × 29,376
4. Step 4: Simplify right side
   21,870x = 862,949,376
5. Step 5: Solve for x
   x = 862,949,376/21,870
6. Step 6: Final answer
   x = 39,458.13