Finding the Fourth Proportional to 1,398,464.64, 2,099,790.72 and 800,100.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398,464.64 : 2,099,790.72 = 800,100.48 : x
2. Step 2: Convert to fraction form
   1,398,464.64/2,099,790.72 = 800,100.48/x
3. Step 3: Cross multiply
   1,398,464.64x = 2,099,790.72 × 800,100.48
4. Step 4: Simplify right side
   1,398,464.64x = 1,680,043,562,971.55
5. Step 5: Solve for x
   x = 1,680,043,562,971.55/1,398,464.64
6. Step 6: Final answer
   x = 1,201,348.62