Finding the Fourth Proportional to 2,117,388.78, 3,174,297.39 and 918,407.97

Step by Step Solution

1. Step 1: Write the proportion equation
   2,117,388.78 : 3,174,297.39 = 918,407.97 : x
2. Step 2: Convert to fraction form
   2,117,388.78/3,174,297.39 = 918,407.97/x
3. Step 3: Cross multiply
   2,117,388.78x = 3,174,297.39 × 918,407.97
4. Step 4: Simplify right side
   2,117,388.78x = 2,915,300,022,126.20
5. Step 5: Solve for x
   x = 2,915,300,022,126.20/2,117,388.78
6. Step 6: Final answer
   x = 1,376,837.38