Finding the Fourth Proportional to 123,377.10, 173,121.60 and 123,377.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,377.10 : 173,121.60 = 123,377.10 : x
2. Step 2: Convert to fraction form
   123,377.10/173,121.60 = 123,377.10/x
3. Step 3: Cross multiply
   123,377.10x = 173,121.60 × 123,377.10
4. Step 4: Simplify right side
   123,377.10x = 21,359,240,955.36
5. Step 5: Solve for x
   x = 21,359,240,955.36/123,377.10
6. Step 6: Final answer
   x = 173,121.60