Finding the Fourth Proportional to 1,109,238.33, 1,664,041.52 and 389,393.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,109,238.33 : 1,664,041.52 = 389,393.43 : x
2. Step 2: Convert to fraction form
   1,109,238.33/1,664,041.52 = 389,393.43/x
3. Step 3: Cross multiply
   1,109,238.33x = 1,664,041.52 × 389,393.43
4. Step 4: Simplify right side
   1,109,238.33x = 647,966,829,868.54
5. Step 5: Solve for x
   x = 647,966,829,868.54/1,109,238.33
6. Step 6: Final answer
   x = 584,154.74