Finding the Fourth Proportional to 806,258.16, 1,112,608.35 and 443,648.09

Step by Step Solution

1. Step 1: Write the proportion equation
   806,258.16 : 1,112,608.35 = 443,648.09 : x
2. Step 2: Convert to fraction form
   806,258.16/1,112,608.35 = 443,648.09/x
3. Step 3: Cross multiply
   806,258.16x = 1,112,608.35 × 443,648.09
4. Step 4: Simplify right side
   806,258.16x = 493,606,569,395.55
5. Step 5: Solve for x
   x = 493,606,569,395.55/806,258.16
6. Step 6: Final answer
   x = 612,219.01