Finding the Fourth Proportional to 404,982.61, 607,465.71 and 105,456.56

Step by Step Solution

1. Step 1: Write the proportion equation
   404,982.61 : 607,465.71 = 105,456.56 : x
2. Step 2: Convert to fraction form
   404,982.61/607,465.71 = 105,456.56/x
3. Step 3: Cross multiply
   404,982.61x = 607,465.71 × 105,456.56
4. Step 4: Simplify right side
   404,982.61x = 64,061,241,057.23
5. Step 5: Solve for x
   x = 64,061,241,057.23/404,982.61
6. Step 6: Final answer
   x = 158,182.70