Finding the Fourth Proportional to 1,209,738.33, 1,669,375.37 and 665,770.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,209,738.33 : 1,669,375.37 = 665,770.15 : x
2. Step 2: Convert to fraction form
   1,209,738.33/1,669,375.37 = 665,770.15/x
3. Step 3: Cross multiply
   1,209,738.33x = 1,669,375.37 × 665,770.15
4. Step 4: Simplify right side
   1,209,738.33x = 1,111,420,287,199.67
5. Step 5: Solve for x
   x = 1,111,420,287,199.67/1,209,738.33
6. Step 6: Final answer
   x = 918,727.84