Finding the Fourth Proportional to 1,665,953.78, 2,498,930.64 and 403,781.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665,953.78 : 2,498,930.64 = 403,781.42 : x
2. Step 2: Convert to fraction form
   1,665,953.78/2,498,930.64 = 403,781.42/x
3. Step 3: Cross multiply
   1,665,953.78x = 2,498,930.64 × 403,781.42
4. Step 4: Simplify right side
   1,665,953.78x = 1,009,021,762,300.71
5. Step 5: Solve for x
   x = 1,009,021,762,300.71/1,665,953.78
6. Step 6: Final answer
   x = 605,672.12