Finding the Fourth Proportional to 1,109,233.58, 1,664,034.31 and 389,388.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109,233.58 : 1,664,034.31 = 389,388.61 : x
2. Step 2: Convert to fraction form
   1,109,233.58/1,664,034.31 = 389,388.61/x
3. Step 3: Cross multiply
   1,109,233.58x = 1,664,034.31 × 389,388.61
4. Step 4: Simplify right side
   1,109,233.58x = 647,955,998,643.04
5. Step 5: Solve for x
   x = 647,955,998,643.04/1,109,233.58
6. Step 6: Final answer
   x = 584,147.48