Finding the Fourth Proportional to 1,490,978.64, 2,057,496.20 and 811,900.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,490,978.64 : 2,057,496.20 = 811,900.24 : x
2. Step 2: Convert to fraction form
   1,490,978.64/2,057,496.20 = 811,900.24/x
3. Step 3: Cross multiply
   1,490,978.64x = 2,057,496.20 × 811,900.24
4. Step 4: Simplify right side
   1,490,978.64x = 1,670,481,658,579.09
5. Step 5: Solve for x
   x = 1,670,481,658,579.09/1,490,978.64
6. Step 6: Final answer
   x = 1,120,392.75