Finding the Third Proportional to 21,156.19 and 29,425.78

Step by Step Solution

1. Step 1: Write the proportion equation
   21,156.19 : 29,425.78 = 29,425.78 : x
2. Step 2: Convert to fraction form
   21,156.19/29,425.78 = 29,425.78/x
3. Step 3: Cross multiply
   21,156.19x = 29,425.78 × 29,425.78
4. Step 4: Simplify right side
   21,156.19x = 865,876,602.17
5. Step 5: Solve for x
   x = 865,876,602.17/21,156.19
6. Step 6: Final answer
   x = 40,927.82