Finding the Fourth Proportional to 123,047.40, 172,383 and 123,047.40

Step by Step Solution

1. Step 1: Write the proportion equation
   123,047.40 : 172,383 = 123,047.40 : x
2. Step 2: Convert to fraction form
   123,047.40/172,383 = 123,047.40/x
3. Step 3: Cross multiply
   123,047.40x = 172,383 × 123,047.40
4. Step 4: Simplify right side
   123,047.40x = 21,211,279,954.20
5. Step 5: Solve for x
   x = 21,211,279,954.20/123,047.40
6. Step 6: Final answer
   x = 172,383