Finding the Fourth Proportional to 123,717.10, 173,670.50 and 123,717.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,717.10 : 173,670.50 = 123,717.10 : x
2. Step 2: Convert to fraction form
   123,717.10/173,670.50 = 123,717.10/x
3. Step 3: Cross multiply
   123,717.10x = 173,670.50 × 123,717.10
4. Step 4: Simplify right side
   123,717.10x = 21,486,010,615.55
5. Step 5: Solve for x
   x = 21,486,010,615.55/123,717.10
6. Step 6: Final answer
   x = 173,670.50