Finding the Fourth Proportional to 404,980.36, 607,462.34 and 105,454.31

Step by Step Solution

1. Step 1: Write the proportion equation
   404,980.36 : 607,462.34 = 105,454.31 : x
2. Step 2: Convert to fraction form
   404,980.36/607,462.34 = 105,454.31/x
3. Step 3: Cross multiply
   404,980.36x = 607,462.34 × 105,454.31
4. Step 4: Simplify right side
   404,980.36x = 64,059,518,351.10
5. Step 5: Solve for x
   x = 64,059,518,351.10/404,980.36
6. Step 6: Final answer
   x = 158,179.32