Finding the Fourth Proportional to 400,019.72, 599,940.60 and 115,648.16

Step by Step Solution

1. Step 1: Write the proportion equation
   400,019.72 : 599,940.60 = 115,648.16 : x
2. Step 2: Convert to fraction form
   400,019.72/599,940.60 = 115,648.16/x
3. Step 3: Cross multiply
   400,019.72x = 599,940.60 × 115,648.16
4. Step 4: Simplify right side
   400,019.72x = 69,382,026,499.30
5. Step 5: Solve for x
   x = 69,382,026,499.30/400,019.72
6. Step 6: Final answer
   x = 173,446.52