Finding the Fourth Proportional to 1,209,035.25, 1,668,468.59 and 665,159.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,035.25 : 1,668,468.59 = 665,159.37 : x
2. Step 2: Convert to fraction form
   1,209,035.25/1,668,468.59 = 665,159.37/x
3. Step 3: Cross multiply
   1,209,035.25x = 1,668,468.59 × 665,159.37
4. Step 4: Simplify right side
   1,209,035.25x = 1,109,797,509,100.98
5. Step 5: Solve for x
   x = 1,109,797,509,100.98/1,209,035.25
6. Step 6: Final answer
   x = 917,919.89