Finding the Fourth Proportional to 123,386.10, 173,134.20 and 123,386.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,386.10 : 173,134.20 = 123,386.10 : x
2. Step 2: Convert to fraction form
   123,386.10/173,134.20 = 123,386.10/x
3. Step 3: Cross multiply
   123,386.10x = 173,134.20 × 123,386.10
4. Step 4: Simplify right side
   123,386.10x = 21,362,353,714.62
5. Step 5: Solve for x
   x = 21,362,353,714.62/123,386.10
6. Step 6: Final answer
   x = 173,134.20