Finding the Fourth Proportional to 456,449.25, 684,736.18 and 190,147.48

Step by Step Solution

1. Step 1: Write the proportion equation
   456,449.25 : 684,736.18 = 190,147.48 : x
2. Step 2: Convert to fraction form
   456,449.25/684,736.18 = 190,147.48/x
3. Step 3: Cross multiply
   456,449.25x = 684,736.18 × 190,147.48
4. Step 4: Simplify right side
   456,449.25x = 130,200,859,091.83
5. Step 5: Solve for x
   x = 130,200,859,091.83/456,449.25
6. Step 6: Final answer
   x = 285,247.17