Finding the Third Proportional to 403,072.88 and 609,147

Step by Step Solution

1. Step 1: Write the proportion equation
   403,072.88 : 609,147 = 609,147 : x
2. Step 2: Convert to fraction form
   403,072.88/609,147 = 609,147/x
3. Step 3: Cross multiply
   403,072.88x = 609,147 × 609,147
4. Step 4: Simplify right side
   403,072.88x = 371,060,067,609
5. Step 5: Solve for x
   x = 371,060,067,609/403,072.88
6. Step 6: Final answer
   x = 920,578.12