Finding the Fourth Proportional to 1,345,636.74, 2,018,111.31 and 398,786.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345,636.74 : 2,018,111.31 = 398,786.34 : x
2. Step 2: Convert to fraction form
   1,345,636.74/2,018,111.31 = 398,786.34/x
3. Step 3: Cross multiply
   1,345,636.74x = 2,018,111.31 × 398,786.34
4. Step 4: Simplify right side
   1,345,636.74x = 804,795,223,027.51
5. Step 5: Solve for x
   x = 804,795,223,027.51/1,345,636.74
6. Step 6: Final answer
   x = 598,077.62