Finding the Fourth Proportional to 805,061.90, 1,207,738.65 and 404,695.10

Step by Step Solution

1. Step 1: Write the proportion equation
   805,061.90 : 1,207,738.65 = 404,695.10 : x
2. Step 2: Convert to fraction form
   805,061.90/1,207,738.65 = 404,695.10/x
3. Step 3: Cross multiply
   805,061.90x = 1,207,738.65 × 404,695.10
4. Step 4: Simplify right side
   805,061.90x = 488,765,913,735.62
5. Step 5: Solve for x
   x = 488,765,913,735.62/805,061.90
6. Step 6: Final answer
   x = 607,115.94