Finding the Fourth Proportional to 123,323.10, 172,827.30 and 123,323.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,323.10 : 172,827.30 = 123,323.10 : x
2. Step 2: Convert to fraction form
   123,323.10/172,827.30 = 123,323.10/x
3. Step 3: Cross multiply
   123,323.10x = 172,827.30 × 123,323.10
4. Step 4: Simplify right side
   123,323.10x = 21,313,598,400.63
5. Step 5: Solve for x
   x = 21,313,598,400.63/123,323.10
6. Step 6: Final answer
   x = 172,827.30