Finding the Third Proportional to 21,578 and 29,152

Step by Step Solution

1. Step 1: Write the proportion equation
   21,578 : 29,152 = 29,152 : x
2. Step 2: Convert to fraction form
   21,578/29,152 = 29,152/x
3. Step 3: Cross multiply
   21,578x = 29,152 × 29,152
4. Step 4: Simplify right side
   21,578x = 849,839,104
5. Step 5: Solve for x
   x = 849,839,104/21,578
6. Step 6: Final answer
   x = 39,384.52