Finding the Fourth Proportional to 1,208,949.48, 1,813,032.72 and 399,151.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,949.48 : 1,813,032.72 = 399,151.98 : x
2. Step 2: Convert to fraction form
   1,208,949.48/1,813,032.72 = 399,151.98/x
3. Step 3: Cross multiply
   1,208,949.48x = 1,813,032.72 × 399,151.98
4. Step 4: Simplify right side
   1,208,949.48x = 723,675,599,992.79
5. Step 5: Solve for x
   x = 723,675,599,992.79/1,208,949.48
6. Step 6: Final answer
   x = 598,598.71