Finding the Fourth Proportional to 1,086,348.10, 1,629,522.15 and 806,412.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,348.10 : 1,629,522.15 = 806,412.10 : x
2. Step 2: Convert to fraction form
   1,086,348.10/1,629,522.15 = 806,412.10/x
3. Step 3: Cross multiply
   1,086,348.10x = 1,629,522.15 × 806,412.10
4. Step 4: Simplify right side
   1,086,348.10x = 1,314,066,378,978.01
5. Step 5: Solve for x
   x = 1,314,066,378,978.01/1,086,348.10
6. Step 6: Final answer
   x = 1,209,618.15