Finding the Fourth Proportional to 1,210,111.98, 1,815,151.56 and 411,949.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,210,111.98 : 1,815,151.56 = 411,949.92 : x
2. Step 2: Convert to fraction form
   1,210,111.98/1,815,151.56 = 411,949.92/x
3. Step 3: Cross multiply
   1,210,111.98x = 1,815,151.56 × 411,949.92
4. Step 4: Simplify right side
   1,210,111.98x = 747,751,539,929.88
5. Step 5: Solve for x
   x = 747,751,539,929.88/1,210,111.98
6. Step 6: Final answer
   x = 617,919.29