Finding the Fourth Proportional to 1,055,240.72, 1,582,687.20 and 297,134.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,055,240.72 : 1,582,687.20 = 297,134.72 : x
2. Step 2: Convert to fraction form
   1,055,240.72/1,582,687.20 = 297,134.72/x
3. Step 3: Cross multiply
   1,055,240.72x = 1,582,687.20 × 297,134.72
4. Step 4: Simplify right side
   1,055,240.72x = 470,271,318,019.58
5. Step 5: Solve for x
   x = 470,271,318,019.58/1,055,240.72
6. Step 6: Final answer
   x = 445,653.12