Finding the Fourth Proportional to 1,455,939.72, 2,009,198.72 and 811,345.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,455,939.72 : 2,009,198.72 = 811,345.76 : x
2. Step 2: Convert to fraction form
   1,455,939.72/2,009,198.72 = 811,345.76/x
3. Step 3: Cross multiply
   1,455,939.72x = 2,009,198.72 × 811,345.76
4. Step 4: Simplify right side
   1,455,939.72x = 1,630,154,862,469.43
5. Step 5: Solve for x
   x = 1,630,154,862,469.43/1,455,939.72
6. Step 6: Final answer
   x = 1,119,658.21