Finding the Fourth Proportional to 1,208,456.58, 1,667,636.82 and 664,592.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208,456.58 : 1,667,636.82 = 664,592.40 : x
2. Step 2: Convert to fraction form
   1,208,456.58/1,667,636.82 = 664,592.40/x
3. Step 3: Cross multiply
   1,208,456.58x = 1,667,636.82 × 664,592.40
4. Step 4: Simplify right side
   1,208,456.58x = 1,108,298,756,532.17
5. Step 5: Solve for x
   x = 1,108,298,756,532.17/1,208,456.58
6. Step 6: Final answer
   x = 917,119.22