Finding the Third Proportional to 56,691 and 123,590

Step by Step Solution

1. Step 1: Write the proportion equation
   56,691 : 123,590 = 123,590 : x
2. Step 2: Convert to fraction form
   56,691/123,590 = 123,590/x
3. Step 3: Cross multiply
   56,691x = 123,590 × 123,590
4. Step 4: Simplify right side
   56,691x = 15,274,488,100
5. Step 5: Solve for x
   x = 15,274,488,100/56,691
6. Step 6: Final answer
   x = 269,434.09