Finding the Fourth Proportional to 1,205,499.72, 1,806,991.99 and 406,506.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205,499.72 : 1,806,991.99 = 406,506.54 : x
2. Step 2: Convert to fraction form
   1,205,499.72/1,806,991.99 = 406,506.54/x
3. Step 3: Cross multiply
   1,205,499.72x = 1,806,991.99 × 406,506.54
4. Step 4: Simplify right side
   1,205,499.72x = 734,554,061,662.62
5. Step 5: Solve for x
   x = 734,554,061,662.62/1,205,499.72
6. Step 6: Final answer
   x = 609,335.74