Finding the Fourth Proportional to 123,581.10, 173,407.20 and 123,581.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,581.10 : 173,407.20 = 123,581.10 : x
2. Step 2: Convert to fraction form
   123,581.10/173,407.20 = 123,581.10/x
3. Step 3: Cross multiply
   123,581.10x = 173,407.20 × 123,581.10
4. Step 4: Simplify right side
   123,581.10x = 21,429,852,523.92
5. Step 5: Solve for x
   x = 21,429,852,523.92/123,581.10
6. Step 6: Final answer
   x = 173,407.20