Finding the Fourth Proportional to 1,116,016.68, 1,672,992.27 and 405,854.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116,016.68 : 1,672,992.27 = 405,854.04 : x
2. Step 2: Convert to fraction form
   1,116,016.68/1,672,992.27 = 405,854.04/x
3. Step 3: Cross multiply
   1,116,016.68x = 1,672,992.27 × 405,854.04
4. Step 4: Simplify right side
   1,116,016.68x = 678,990,671,668.27
5. Step 5: Solve for x
   x = 678,990,671,668.27/1,116,016.68
6. Step 6: Final answer
   x = 608,405.49